Stephanie's bike costs $356 * 2 = $<<356*2=712>>712.

So, their bikes cost $356 + $712 = $<<356+712=1068>>1068 in total.

# Answer

1068
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Marion’s bike cost $356. Stephanie’s bike is worth twice as much. What is the total price of their bikes?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
1068
Marion’s bike cost $356. Stephanie’s bike is worth twice as much. What is the total price of their bikes?
train