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

### Instruction:
 本冰箱里有20个鸡蛋。昨天，他早上吃了4个鸡蛋，下午吃了3个鸡蛋。本现在还剩下多少个鸡蛋？


### Response:
 本昨天吃了4 + 3 = <<4+3=7>>7个鸡蛋。
所以他现在还剩下20 - 7 = <<20-7=13>>13个鸡蛋。