Xiaoli has a round coaster. The circumference of the coaster is 31.4 cm. What is the diameter of the coaster in cm?
小丽有一个圆形的杯垫，杯垫的周长是31.4厘米，这个杯垫的直径是多少厘米？
<gadget id="calculator">31.4 / 3.14</gadget>
<output>10</output>

<result>10</result>