The circumference of Earth is 40,000 kilometers. How many trips around Earth could you take if you travel one billion meters?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
The circumference of Earth is 40,000 kilometers. How many trips around Earth could you take if you travel one billion meters?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
25
The circumference of Earth is 40,000 kilometers. How many trips around Earth could you take if you travel one billion meters?
train