A cylindrical wooden box has a base radius of 2 decimeters and a height of 15 decimeters. What is its volume in cubic decimeters?
一个圆柱形木箱，底面半径为2分米，高为15分米，它的体积是多少立方分米．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 15</gadget>
<output>188.4</output>

<result>188.4</result>