A cuboid becomes a cube if its length is reduced by 1.5 cm. At this time, the surface area is reduced by 18 cm2. What is the volume of the original cuboid?
一个长方体，如果长减少1.5厘米，就变成一个正方体，这时表面积比原来减少18平方厘米，原来长方体的体积是多少立方厘米？
<gadget id="calculator">18 / 4 / 1.5</gadget>
<output>3</output>

<gadget id="calculator">3 + 1.5</gadget>
<output>4.5</output>

<gadget id="calculator">4.5 * 3 * 3</gadget>
<output>40.5</output>

<result>40.5</result>