A cuboid is 1.5 meters long and its cross-section is a square with a perimeter of 20 centimeters. What is its volume?
一根长方体木料长1.5米，横截面是周长为20厘米的正方形，它的体积是多少．
<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">5 * 5 * 1.5 * 100</gadget>
<output>3_750</output>

<result>3_750</result>