<|system|>
The product of two inches and the circumference of a circle, in inches, is equal to the circle's area. What is the length of the radius of the circle, in inches?</s>.
<|user|>
Can you answer based on context?
<|assistant|>
Let $r$ be the radius of the circle. The given tells us that $2\cdot2\pi r=\pi r^2$. Dividing by $\pi r$, we have $r=4$ inches.