A cylinder has a base circumference of 31.4 cm and a height of 10 cm. What is the volume of the cylinder?
一个圆柱的底面周长是31.4cm，高是10cm，这个圆柱的体积是多少？
<gadget id="calculator">31.4 / 3.14 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 10</gadget>
<output>785</output>

<result>785</result>