There are two granaries, A and B, and A will give 1/5 of its own grain to B, and the two granaries are equal, so how much is B’s A’s
甲乙两个粮仓，甲仓将自己存粮的(1/5)给乙仓，则两仓存粮相等，则乙仓库是甲的多少
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<result>3/5 = around 0.6</result>