After selling (2/5) of all cooking oil in large quantities, another 36 barrels are purchased, and the number of barrels of cooking oil is equivalent to the original (2/3). How many barrels of cooking oil are there?
大张量贩售出全部食用油的(2/5)后，又购进36桶，这时食用油的桶数相当于原来的(2/3)．原来食用油是多少桶？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(2/3) - (3/5)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">36 / (1/15)</gadget>
<output>540</output>

<result>540</result>