A zoo has 21 penguins and twice as many polar bears?  How many total animals do they have? Let's think step by step and output the final answer after "####".
user
There are 21*2=<<21*2=42>>42 polar bears
So the total 21+42=<<21+42=63>>63 total animals
#### 63
A zoo has 21 penguins and twice as many polar bears?  How many total animals do they have?
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