Guangming Township dug a 2.4-kilometer-long canal. Its cross-section is trapezoidal, with a width of 3.2 meters at the top, a width of 2.8 meters at the bottom, and a depth of 1.5 meters. How many cubic meters of soil were excavated?
光明乡挖一条长2.4千米的水渠，它的横断面是梯形，上底宽3.2米，下底宽2.8米，深1.5米，挖出的土共有多少立方米？
<gadget id="calculator">3.2 + 2.8</gadget>
<output>6</output>

<gadget id="calculator">1.5 / 2</gadget>
<output>0.75</output>

<gadget id="calculator">2.4 * 1_000</gadget>
<output>2_400</output>

<gadget id="calculator">6 * 0.75 * 2_400</gadget>
<output>10_800</output>

<result>10_800</result>