A cuboid, the ratio of length, width, and height is 5:2:1, and the sum of the lengths of the sides is 160 cm, what is its volume?
一个长方体，长、宽、高的比是5：2：1，棱长的总和是160厘米，它的体积是多少．
<gadget id="calculator">160 / 4</gadget>
<output>40</output>

<gadget id="calculator">5 + 2 + 1</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">40 * (5/8) * 40 * (1/4) * 40 * (1/8)</gadget>
<output>1_250</output>

<result>1_250</result>