A cuboid becomes a cube if its height increases by 3 cm. This is an increase of 56 square centimeters in surface area compared to the original one. What is the volume of the original cuboid?
一个长方体，如果高增加了3cm，就变成一个正方体．这是表面积比原来增加了56平方厘米，原来长方体的体积是多少？
<gadget id="calculator">56 / 4 / 3</gadget>
<output>14/3 = around 4.666667</output>

<gadget id="calculator">(14/3) - 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(14/3) * (14/3) * (5/3)</gadget>
<output>980/27 = around 36.296296</output>

<result>980/27 = around 36.296296</result>