The side area of a cylinder is 6.28 square decimeters, and its height is 2 decimeters. What is its volume in cubic decimeters?
一个圆柱侧面积是6.28平方分米，高是2分米，它的体积是多少立方分米．
<gadget id="calculator">6.28 / 2</gadget>
<output>3.14</output>

<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<gadget id="calculator">3.14 / 6.28</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 ** 2</gadget>
<output>0.25</output>

<gadget id="calculator">3.14 * 0.25 * 2</gadget>
<output>1.57</output>

<result>1.57</result>