cuboid wooden block, after dropping 5 cm along its height, becomes a cube, and its surface area is reduced by 200 square centimeters. Find the volume of the original cuboid.
一个长方体木块，沿高据掉5厘米后，成为一个正方体，表面积减少200平方厘米，求原来长方体的体积．
<gadget id="calculator">200 / 4 / 5</gadget>
<output>10</output>

<gadget id="calculator">5 + 10</gadget>
<output>15</output>

<gadget id="calculator">10 * 10 * 15</gadget>
<output>1_500</output>

<result>1_500</result>