The carriage of a train is a cuboid with a length of 4m, a width of 2m and a height of 1.5m. This carriage is full of sand. Unload the sand from this carriage and pile it into a conical sand pile with a height of 3m. How many square meters is the bottom area of the sand pile?
一节火车的车厢是长方体，长是4m，宽是2m，高是1.5m，这节车厢装了满满的一车厢沙子．将这一车厢沙子卸下来，堆成了一个高是3m的圆锥形沙堆，沙堆的底面积是多少平方米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1.5 / (1/3) / 3</gadget>
<output>1.5</output>

<gadget id="calculator">4 * 2 * 1.5</gadget>
<output>12</output>

<result>12</result>