The diameter of the base of a cylinder is 2 decimeters and the height is 0.5 meters. What is the volume of the cylinder in decimeters**3.
一个圆柱的底面直径是2分米，高是0.5米，圆柱的体积是多少分米**3．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">0.5 * 10</gadget>
<output>5</output>

<gadget id="calculator">3.14 * 1 * 5</gadget>
<output>15.7</output>

<result>15.7</result>