Why is this not the right answer?

I get this error: Oops, try again. double_list([0, 1]) returned 2 instead of [0, 2]

And in console i get: [6, 10, 14], which is correct.

Thanks for your help in advance.

Brg

```
n = [3, 5, 7]
def double_list(x):
for i in range(0, len(x)):
x[i] *= 2
return x[i]
double_list(n)
print n
```