People pls help for a friend dont want to do it myself

Answer:
Brian has 120 pieces.
Step-by-step explanation:
We need to divide 90 by 3/4, and that will get us our answer.
90/(3/4)
90/1 / 3/4
90/1 x 4/3
90 x 4 = 360
360/3 = 120 Brian has 120 pieces.