Well, honey, 90 can go into 400 a grand total of 4 times. That's it, no more, no less. So, grab your calculator and do the math if you don't believe me!
To determine how many times 90 can go into 400, we divide 400 by 90. The quotient is 4 with a remainder of 40. This means that 90 can go into 400 four times, with 40 left over.