A cylinder has a volume of 250 cubic centimeters and a lateral area of 100 square centimeters, find the radius of the base of the cylinder.
一个圆柱的体积是250立方厘米，侧面积是100平方厘米，求这个圆柱的底面半径．
<gadget id="calculator">250 / 100</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) * 2</gadget>
<output>5</output>

<result>5</result>