A zoo has 21 penguins and twice as many polar bears?  How many total animals do they have?
There are 21*2=<<21*2=42>>42 polar bears
So the total 21+42=<<21+42=63>>63 total animals
#### 63
<|Human|>

A zoo has 21 penguins and twice as many polar bears?  How many total animals do they have?

<|Assistant|>

There are 21*2=<<21*2=42>>42 polar bears
So the total 21+42=<<21+42=63>>63 total animals
#### 63