A cylinder with a height of 10 cm, if its height is truncated by 3 cm, its surface area is reduced by 94.2 cm2. What is the volume of this cylinder in cubic centimeters?
一个高10厘米的圆柱体，如果把它的高截短3厘米，它的表面积減少94.2平方厘米．這个圆柱体积是多少立方厘米．
<gadget id="calculator">94.2 / 3</gadget>
<output>31.4</output>

<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>