cuboid becomes a cube if its height is reduced by 2 cm. At this time, the surface area is reduced by 64 square centimeters. What is the volume of the original cuboid in cubic centimeters?
一个长方体，如果高减少2厘米，就变成一个正方体．这时表面积比原来减少64平方厘米．原来长方体的体积是多少立方厘米？
<gadget id="calculator">64 / 4 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 + 2</gadget>
<output>10</output>

<gadget id="calculator">8 * 8 * 10</gadget>
<output>640</output>

<result>640</result>