A cylindrical container contains (4/5) volume of alcohol, after pouring 20L from it, the alcohol in the container still occupies (2/3) volume of this container, what is the volume of this container in L
一个圆柱形容器内盛有(4/5)容积的酒精，从中倒出20L后，容器中的酒精还占这个容器的(2/3)容积，这个容器的容积是多少L
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(4/5) - (2/3)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">20 / (2/15)</gadget>
<output>150</output>

<result>150</result>