<|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 [10, 40, 5, 9], create an equation that equals 89. Show each operation step-by-step to reach this target number. Each number can only be used once and only once. Break down the work into the <think>...</think> part and finalize the solution in <answer>...</answer>. Hint: You might need to use multiplication or division at least once to hit the exact target number. Example solution format: <answer>5 * 9 - 40 / 10 = 45 - 4 = 41, then you can see you are one from reaching 89 by adding 45. So overall equation will be 45 + 45 = 89</answer><|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>