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

### Instruction:
 ゾウはペンギンが21匹いて、その2倍の数のシロクマがいます。合計で何匹の動物がいますか？


### Response:
 シロクマ：21(2)=42
合計：21+42=<<21+42=63>>63