If the lateral area of a cylinder is 60 square meters and the diameter of the base is 10 meters, what is its volume?
一个圆柱的侧面积是60平方米，底面直径是10米，则它的体积是多少．
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">30 * 5</gadget>
<output>150</output>

<result>150</result>