A rope with a length of 12.56 meters can wrap a circle exactly 10 times. What is the approximate diameter of the circle in meters?
一根长12.56米的绳子把一个圆刚好可以绕10圈，这个圆的直径大约是多少米．
<gadget id="calculator">12.56 / 10 / 3.14</gadget>
<output>0.4</output>

<result>0.4</result>