There are two barrels of gasoline, A and B, weighing 180 kg in total, and the gasoline of A barrel is less than that of B barrel (2/5). How many kilograms is a barrel of gasoline?
有甲乙两桶汽油共重180千克，甲桶汽油比乙桶少(2/5)．乙桶汽油有多少千克？
<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">(3/5) + 1</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">180 / (8/5)</gadget>
<output>225/2 = around 112.5</output>

<result>225/2 = around 112.5</result>