If the circumference of the base of a cylinder is 6.28dm and the height is 1.5dm, what is its volume?
一个圆柱的底面周长是6.28dm，高是1.5dm，那么它的体积是多少．
<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 * 1.5</gadget>
<output>4.71</output>

<result>4.71</result>