A cuboid tin oil drum has a square bottom, side length is 0.2 meters, and height is 0.5 meters. What is the capacity of the oil drum in liters? (thickness is ignored)
一个长方体的铁皮油桶底面是正方形，边长是0.2米，高是0.5米，油桶的容量是多少升？(厚度略去不计)
<gadget id="calculator">0.2 * 0.2 * 0.5 * 1_000</gadget>
<output>20</output>

<result>20</result>