<|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
Use the numbers [30, 30, 20, 1] and create an equation that equals 120. You must employ basic arithmetic operations: addition (+), subtraction (-), multiplication (*), and division (/). Each number can only be used once. Present the calculations step by step in <think> </think> tags and the final equation and operation result in <answer> </answer> tags, for example <answer> (20 * 1) + (30 + 30) = 120 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>