For a cylinder, it is known that every time the height increases by 1 cm, its side will increase by 31.4 square centimeters. If the height is 16 cm, what is its volume in cubic centimeters?
一个圆柱体，已知高每增加1厘米，它的侧面就增加31.4平方厘米，如果高是16厘米，它的体积是多少立方厘米．
<gadget id="calculator">31.4 / 1 / 3.14 / 2</gadget>
<output>5</output>

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

<gadget id="calculator">3.14 * 25 * 16</gadget>
<output>1_256</output>

<result>1_256</result>