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

### Instruction:
 饼干每个含有15卡路里，曲奇每个含有50卡路里。如果吉米吃了7个曲奇，他需要吃多少块饼干才能总共摄入500卡路里？


### Response:
 7个曲奇的卡路里数是7 x 50 = <<7*50=350>>350
每块饼干的卡路里数是15
吉米需要吃的饼干数是350 / 15 = <<350/15=23>>23