Hi!
So first we need to figure out how many apples the bakers have, and then just divide the total number of apples by how many the bakers need for each pie.
If the bakers have 15 boxes of apples, 18 apples per box, we just need to multiply 15 by 18.
15 × 18 = 270
Then divide 270 by 7
270 ÷ 7 = about 38
So the correct answer is B
Hope this helps :)