A barrel of oil is poured out (1/4) of the total amount for the first time, and (1/5) of the total amount is poured out for the second time, leaving 22 kilograms. How many kilograms is this barrel of oil originally?
一桶油第一次倒出总量的(1/4)，第二次倒出总量的(1/5)，还剩22千克，这桶油原来有多少千克？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/4) - (1/5)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">22 / (11/20)</gadget>
<output>40</output>

<result>40</result>