The compartment of a truck is a cuboid with a length of 4m, a width of 2.5m, and a height of 2m. It is filled with a truckload of sand. After unloading, the pile of sand forms a cone with a height of 2m. What is the area of the bottom of the pile of sand? square meter? (First find the volume of the carriage, and then find the bottom area of the sand pile).
一辆货车的车厢是一个长方体，它的长是4m，宽是2.5m，高是2m，装满一车沙子，卸下后的沙堆形成一个高2m的圆锥，沙堆的底面积是多少平方米？(先求出车厢的容积，再求沙堆的底面积)．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / (1/3) / 2</gadget>
<output>3</output>

<gadget id="calculator">4 * 2.5 * 3</gadget>
<output>30</output>

<result>30</result>