Shengli Primary School newly dug a cuboid bunker, which is 4 meters long, 2 meters wide, and 4 decimeters deep. The yellow sand weighs 1.4 tons per cubic meter. How many tons of yellow sand are needed to fill the bunker?
胜利小学新挖一个长方体沙坑，长4米，宽2米，深4分米，每立方米黄沙重1.4吨，填满这个沙坑需要黄沙多少吨？
<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">4 * 2 * (2/5)</gadget>
<output>16/5 = around 3.2</output>

<gadget id="calculator">(16/5) * 1.4</gadget>
<output>4.48</output>

<result>4.48</result>