510
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What is the largest multiple of 30 which is less than 520?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
510
What is the largest multiple of 30 which is less than 520?
train