cuboid becomes a cube if its height is increased by 2 cm. At this time, the surface area increased by 56 square centimeters compared to the original. What is the volume of the original cuboid in cubic centimeters?
一个长方体，如果高增加2厘米，就变成一个正方体．这时，表面积比原来增加56平方厘米．原来长方体的体积是多少立方厘米．
<gadget id="calculator">56 / 4 / 2</gadget>
<output>7</output>

<gadget id="calculator">7 - 2</gadget>
<output>5</output>

<gadget id="calculator">7 * 7 * 5</gadget>
<output>245</output>

<result>245</result>