Xiaoxiao uses a compass to draw a circle with a diameter of 20 cm. What is the distance between the two feet of the compass in cm?
笑笑用圆规画一个直径为20厘米的圆，圆规两脚间的距离是多少厘米．
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<result>10</result>