The school digs a cuboid bunker, 4 meters long, 2 meters wide, and 4 decimeters deep. If each cubic meter of sand weighs 1.4 tons, how many tons of sand are needed to fill the bunker?
学校挖一个长方体沙坑，长4米，宽2米，深4分米．如果每立方米沙重1.4吨，需要多少吨沙才能填满沙坑？
<gadget id="calculator">4 * 2 * 0.4</gadget>
<output>3.2</output>

<gadget id="calculator">3.2 * 1.4</gadget>
<output>4.48</output>

<result>4.48</result>