A cylinder has a radius of 10 cm and a lateral area of 100 cm2, what is its volume?
圆柱的半径是10厘米，侧面积是100平方厘米，它的体积是多少？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">100 * 5</gadget>
<output>500</output>

<result>500</result>