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.

With former President Trump looking on silently from his seat at the defense table, his civil fraud trial turned to the allegedly fraudulent valuation of his 40 Wall Street property.

The Trump Organization's assistant controller, Donna Kidder, testified that around 2012, the company's then-chief financial officer, Allen Weisselberg, instructed her to omit from a financial ledger some of the fees the company charged to manage the building.

Kidder said Weisselberg described it as money that moved within the Trump Organization from "one pocket to another."

The ledger documents, which were provided to the real estate investment firm Ladder Capital, were related to the refinancing of 40 Wall Street.

"Allen Weisselberg said that since they were affiliated entities, management fees could be omitted," Kidder said.

Lowering expenses would make the building's net operating income higher and, thereby, make the building more valuable, state attorneys said. The move helped the Trump Organization claim 40 Wall Street was worth $540 million when its true appraised value was $260 million, said the state.

Kidder also testified about the value of a penthouse apartment in Trump Park Avenue that was rented by Ivanka Trump and Jared Kushner in 2011. The attorney general's office has alleged the apartment was reported at a value several times higher than the agreed selling price.

Kidder testified that Ivanka Trump had been given an option to buy the unit, Penthouse 28, for $8.5 million. However, on statements of financial condition, the Trump Organization valued the apartment significantly higher, at $20.8 million in 2012 and $25 million in 2013.