Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
Simone ate 1/2 of an apple each day for 16 days. Lauri ate 1/3 of an apple each day for 15 days. How many apples did the two girls eat altogether?

### Response:
Simone ate 1/2 x 16 = <<1/2*16=8>>8 pieces of apple.
Lauri ate 1/3 x 15 = <<1/3*15=5>>5 pieces of apple.
Together, they ate 8 + 5 = <<8+5=13>>13 pieces of apple.
#### 13