The circumference of a cylinder is 12.56 centimeters and its height is 0.5 decimeters. What is its volume in cubic centimeters?
一个圆柱的底面周长是12.56厘米，高是0.5分米，它的体积是多少立方厘米．
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 0.5 * 10</gadget>
<output>62.8</output>

<result>62.8</result>