A truck box is a cuboid with a length of 4 meters, a width of 15 decimeters, and a height of 4 meters. It is filled with a truckload of sand. After unloading, the sand is piled into a cone with a height of 1.5 meters. The area of its bottom is How many square meters is it?
一辆货车箱是一个长方体，它的长是4米，宽是15分米，高是4米，装满一车沙，卸后沙堆成一个高是1.5米的圆锥形，它的底面积是多少平方米？
<gadget id="calculator">4 * 1.5 * 4</gadget>
<output>24</output>

<gadget id="calculator">3 / 1.5</gadget>
<output>2</output>

<gadget id="calculator">24 * 2</gadget>
<output>48</output>

<result>48</result>