If the circumference of a circle is 25.12 decimeters, what is its diameter in centimeters?
一个圆的周长是25.12分米，它的直径是多少厘米．
<gadget id="calculator">25.12 / 3.14</gadget>
<output>8</output>

<gadget id="calculator">8 * 10</gadget>
<output>80</output>

<result>80</result>