1532 guitar picks divided by 37 is 41.4(and some change)! Let’s round down to 41, bc we can’t have part of one guitar pick. So assuming 36 of the boxes have 41 picks in each box, we will then do 41 multiplied by 36, which equals 1476 guitar picks. Let’s take that total from the 36 boxes and subtract it from the grand total number of guitar picks so 1532-1476, the sum is 56. From all of that we know that the last box or box 37 has 56 guitar picks in it!