The side length of a cube fuel tank is 50 cm. If the oil weighs 0.8 kg per liter, how much does the oil weigh in the barrel when it is full?
一个正方体油箱的棱长是50厘米，如果每升油重0.8千克，装满油后这桶油重多少千克？
<gadget id="calculator">50 / 10</gadget>
<output>5</output>

<gadget id="calculator">5 * 5 * 5 * 0.8</gadget>
<output>100</output>

<result>100</result>