A cuboid oil drum with a height of 60 cm has a square bottom with a side length of 40 cm, and the height of the oil contained in the drum is 50 cm. How many liters of oil does this oil drum hold?
一个高60厘米的长方体油桶，底面是边长为40厘米的正方形，桶内盛油的高度是50厘米，这个油桶盛了多少升油？
<gadget id="calculator">50 / 1_000</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">40 * 40 * (1/20)</gadget>
<output>80</output>

<result>80</result>