Use a compass to draw a circle with a diameter of 5 cm. What is the distance between the two feet of the compass in cm?
用圆规画一个直径是5厘米的圆，圆规两脚间的距离应是多少厘米．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>