The net weight of a barrel of oil is 80 kilograms (not including the weight of the barrel), pour out (1/4), how many kilograms are poured out?
一桶油净重80千克(不含桶重)，倒出(1/4)，倒出多少千克？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">80 * (1/4)</gadget>
<output>20</output>

<result>20</result>