The school filled the sandpit on the playground with fine and soft sand for the sports meeting! The bunker is 4m long, 2m wide and 0.5m deep. Filled with 0.4m thick sand, how many cubic meters of sand are shared?
学校为召开运动会给操场上的沙坑填上了又细又软的沙子！沙坑长4m，宽2m，深0.5m．填上了厚0.4m的沙子，共用了多少立方米沙子？
<gadget id="calculator">4 * 2 * 0.4</gadget>
<output>3.2</output>

<result>3.2</result>