Former President Donald Trump and New York Attorney General Letitia James, in separate media appearances, addressed the ruling Friday evening, trading barbs while reacting to the judgment.

Speaking from his Mar-a-Lago estate in Florida, Trump said he had to pay a fine for "having built a perfect company." Accusing both James and Judge Arthur Engoron of being politically motivated, Trump denied committing any fraud and said he plans to appeal.

20:02

Trump responds to ruling: 'A crooked New State judge just ruled I need to pay a fine'

Meanwhile, in New York, James lauded the ruling as a victory for all Americans and the principles of equal justice under the law -- saying "former presidents are no exception."

"The scale and scope of Donald Trump's fraud is staggering -- and so, too, is his ego and his belief that the rules don't apply to him," she said.

James also heralded Judge Engoron's penalties as effective remedies to "ensure this fraud cannot continue."

4:43

Letitia James delivers remarks after Trump ruling

Based on Friday's decision, former President Trump and his co-defendants will likely owe $463.9 million based on their initial fine and the prejudgment interest imposed by the court, according to a representative for the New York attorney general.

Trump himself will likely owe $453.5 million, between his $354.86 million fine and $98.6 million in interest.

The amount of interest owed by the defendants is set to increase every day they do not pay the fines.

New York Attorney General Letitia James, whose office brought the civil fraud case against Donald Trump, described the ruling as a "tremendous victory for this state, this nation, and for everyone who believes that we all must play by the same rules -- even former presidents."

“When powerful people cheat to get better loans, it comes at the expense of honest and hardworking people," James said in a statement. "Everyday Americans cannot lie to a bank to get a mortgage to buy a home, and if they did, our government would throw the book at them. There simply cannot be different rules for different people."

The former president is "finally facing accountability for his lying, cheating, and staggering fraud," she said.

In addition to the fines imposed on Donald Trump and his co-defendants, the judge's decision leaves the Trump Organization in a constrained position to continue operating their New York-based businesses.

While Judge Engoron backtracked on his September summary judgment ruling -- vacating the part of his order that canceled their business certificates -- Donald Trump and his sons are temporarily unable to lead their namesake company. Trump faces a three-year ban on serving as the leader of a New York company, and his sons face two-year bans.

An independent monitor will continue to oversee the company's finances for at least three years, and the company needs to install a director of compliance.

Regarding the combined $364 million owed by the defendants, experts who ABC News spoke with believe it is unlikely any of them foot the bill immediately; instead, they can cover the fine with a bond while they appeal.

Former President Donald Trump said he is attending his civil trial to "expose" New York Attorney General Letitia James, during an exchange with ABC News.

Asked by ABC News' Aaron Katersky why he was attending the trial even though he's not required to be there, Trump replied, "Because this trial is a rigged trial. It's a fraudulent trial."

"The attorney general is a fraud, and we have to expose her as that," Trump said after exiting the courtroom for the afternoon break. "You see what's going on. It's a rigged deal."

James has said of her probe, "No matter how powerful you are, no matter how much money you think you may have, no one is above the law."

The statements from Trump follow the conclusion of the state's lengthy direct examination of longtime Mazars accountant Donald Bender, who testified about the procedures Mazars and the Trump Organization used to compile a central piece of evidence in the case -- Trump's statements of financial condition between 2011 and 2020.

Trump appeared attentive during the testimony, often studying the exhibits displayed on the court's screens -- including a recurring spreadsheet titled "Jeff Supporting Data" prepared by co-defendant and Trump Organization executive Jeffrey McConney, which contained the source information for the financial statements.

Bender testified about a specific red notation spelled "PBC" that appeared on the Excel file across multiple years. The notation -- indicating that the files were "Prepared By [the] Client" -- seemed to emphasize how much of the accounting was done by the Trump Organization rather than Mazars.

Testifying about letters of representation issued by the Trump Organization in support of the statements, Bender addressed specific language in the letter stating that the Trump Organization had included all the relevant records and data needed for the statements.

"We have not knowingly withheld from you any financial records or related data that in our judgment would be relevant to your compilation," the letter read.

But Bender testified that he later learned that meaningful information was indeed omitted -- information he said he learned in 2021 during meetings with prosecutors.

When asked repeatedly if Mazars would have issued the statements if they knew the Trump Organization had withheld information, Bender repeated that Mazars would not have issued the statements.

-ABC News' Aaron Katersky, Jack Feeley and Peter Charalambous