<|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 [9, 15, 30, 45], create an equation that equals 56. Use basic arithmetic operations (+, -, *, /) and each number can be used once. Show your work in <think> </think> tags. Your goal is to maximize your understanding of the Countdown game and find an intuitive approach that minimizes the use of multiplication and division, as these operations can be cumbersome. Return the final equation and answer in <answer> </answer> tags, for example: <answer>2 + 3 + 4 + 7 = 16</answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>