The school needs to dig a cuboid sandpit with a length of 4 meters, a width of 2 meters and a depth of 0.5 meters. How many cubic meters of soil do we need to dig out?
学校要挖一个长方体沙坑，长4米，宽2米，深0.5米，需要挖出多少立方米的土？
<gadget id="calculator">4 * 2 * 0.5</gadget>
<output>4</output>

<result>4</result>