<|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 [5, 10, 300, 20], create an equation that equals 77. Employ all of these numbers and basic arithmetic operations (+, -, *, /). Additionally, ensure each number is used only once. Use the <think> </think> block to include your reasoning and attempt. After showing your working and an equation, please return the final equation and answer in the <answer> </answer> block, complying with the format provided for an exemplary answer as given in the example. <|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>