<|im_start|>system
You are a helpful assistant. You first thinks about the reasoning process in the mind and then provides the user with the answer.<|im_end|>
<|im_start|>user
Using the numbers [34, 68, 29, 81], create an equation that equals 456. You can use basic arithmetic operations (+, -, *, /) to solve the puzzle, and each number can only be used once. Provide your work and solution in <think> </think> tags and return your equation and answer in <answer> </answer> tags, for example <answer> 81 - 29 * 34 = 456 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>