7 * 3

A job interview is in progress, a bright and experienced accountant is interviewing for a position of a CFO. He is being interviewed by the members of board of directors and a CEO. During the interview the CEO suddenly asks: "Tell me, what is seven multiplied by three?" The accountant thinks fast and tells "22." Once the interview is over the accountant goes out, takes out the calculator and finds the answer – 21, disappointed, he goes home. Next morning he gets a call from the CEO, "Hey, you got a job." The accountant is pleasantly surprised. He cannot but ask, "Thank you very much for the job but what about seven multiplied by three?" The CEO tells him – "of all the candidates we interviewed, you came the closest."