There exist several positive integers $x$ such that $\frac{1}{x^2+x}$ is a terminating decimal. What is the second smallest such integer?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
There exist several positive integers $x$ such that $\frac{1}{x^2+x}$ is a terminating decimal. What is the second smallest such integer?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
4
There exist several positive integers $x$ such that $\frac{1}{x^2+x}$ is a terminating decimal. What is the second smallest such integer?
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