The height of a cylinder is 10dm, and the ratio of its side area to the base area is 5:1, what is the volume of this cylinder in cubic decimeters?
一个圆柱体的高为10dm，它的侧面积与底面积之比为5﹕1，这个圆柱体的体积是多少立方分米．
<gadget id="calculator">10 / 5</gadget>
<output>2</output>

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

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 10</gadget>
<output>502.4</output>

<result>502.4</result>