To determine how many times 21 goes into 90, we need to perform integer division. When we divide 90 by 21, the result is 4 with a remainder of 6. Therefore, 21 goes into 90 four times evenly, with no remainder.
Well, honey, 21 goes into 90 four times with a remainder of 6. So, you can fit 21 into 90 a total of four times before you have to deal with that pesky leftover 6. Hope that clears things up for you!