Is the greatest piece of evidence yet that Trump has no clue how to run a business?

And no clue on how the economy, and his economic policies, can affect businesses? In an article in Vanity Fair Trump reacts to GM cutting 1,600 jobs in one town:

“Tearing into the company during an interview on Monday, Trump relayed his conversation with C.E.O. Mary Barra to The Wall Street Journal, telling the paper he told her, “I heard you’re closing your plant” and warning that it better not “be closed for long . . . Mary, because if it is you have a problem,” like the 1920s gangster he thinks he is. To the Journal, the president repeated his vague threat about what might happen if the company doesn’t immediately open a new facility in the town where they literally just announced they’ll be closing the existing one. “They better damn well open a new plant there very quickly,” Trump told the paper. “I love Ohio. I told them, ‘you’re playing around with the wrong person.’”

Does he not understand the basic math problem here?