What is the volume of a cylinder with a base circumference of 6.28 decimeters and a height of 5 decimeters?
一个圆柱体，底面周长是6.28分米，高是5分米，体积是多少．
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

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

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

<result>15.7</result>