Three cylindrical boxes of equal height and base radius of 10 cm are stacked together. Take away a box, the surface area is reduced by 628cm**2. What is the volume of each box?
把3个高相等，底面半径都是10cm的圆柱形盒子叠放在一起．拿走一个盒子，表面积就减少628cm**2．每个盒子的体积是多少？
<gadget id="calculator">3.14 * 10 * 2</gadget>
<output>62.8</output>

<gadget id="calculator">628 / 62.8</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 10</gadget>
<output>3_140</output>

<result>3_140</result>