If the circumference of a cylinder is 6.28 cm and the height is 10 cm, what is its volume in cubic centimeters?
一个圆柱的周长是6.28厘米，高是10厘米，它的体积是多少立方厘米．
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 10</gadget>
<output>31.4</output>

<result>31.4</result>