100*3=300 (piece)

3*3=9 (1) A big monk eats three steamed buns.

1*3=3 (a) Three young monks eat three steamed buns.

3/3= 1 (a) A young monk ate a steamed bun.

Suppose they are all young monks.

1* 100= 100 (pieces) * * * Eat 100 steamed buns.

300- 100 = 200 (one) If they are all young monks, there are 200 more steamed buns.

9- 1 = 8 (1) A big monk eats eight more steamed buns than a young monk.

Big monk: 200/8=25 (person)

Little monk: 100—25=75 (person)