A cuboid bunker is 4 meters long, 2 meters wide, and 0.5 meters deep. If the yellow sand weighs 1.4 tons per cubic meter, how many tons does the yellow sand weigh?
一个长方体沙坑，长4米，宽2米，深0.5米，如果每立方米黄沙重1.4吨，这黄沙重多少吨？
<gadget id="calculator">4 * 2 * 0.5</gadget>
<output>4</output>

<gadget id="calculator">1.4 * 4</gadget>
<output>5.6</output>

<result>5.6</result>