and B have two cups of water, and cup A contains (3/5) kilograms. If you pour (1/5) kilograms of water into cup B, the two cups have the same amount of water. What is the total number of kilograms in the two cups of water?
甲乙两杯水，甲杯有(3/5)千克，如果倒给乙杯(1/5)千克水，两杯水同样多，两杯水共多少千克．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">(3/5) - (1/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 2</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>