The sum of the sides of a cuboid is 80 cm. It is known that the length is 2.5 times the width and the height is 1.5 times the width. What is the volume of the cuboid?
一个长方体的棱长总和是80厘米，已知长是宽的2.5倍，高是宽的1.5倍，那么这个长方体的体积是多少．
<gadget id="calculator">80 / 4</gadget>
<output>20</output>

<gadget id="calculator">5 + 2 + 3</gadget>
<output>10</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">20 * (1/2)</gadget>
<output>10</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">10 * 20 * (3/10) * 20 * (1/5)</gadget>
<output>240</output>

<result>240</result>