Because 53 is a three-digit number, 5 and 53 are not divided by 73, so they can only retreat to the third place, and three digits can't be divided by two digits of 73, so the quotient is in single digits, which is a single digit.

The quotient of 69 people is (2) digits. Because 6 can't be divided by 46, but 69 can be divided by 46, only 1 is in the tenth place. I don't care what comes after the tenth 1, it's all double digits. You got it?

I am a senior one, which may be a bit complicated, hee hee.