The lid of the container containing the alcohol solution was opened, the alcohol evaporated (1/3) on the first day, and the rest (3/5) evaporated on the second day. At the end of the second day, the remaining alcohol in the container accounted for the original ((())/(())).
存有酒精溶液的容器的盖子被打开，第一天酒精蒸发了(1/3)，第二天蒸发了剩余的(3/5)．第二天结束时，容器内剩下的酒精占原来的((())/(()))．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">1 - (1/3) - (2/5)</gadget>
<output>4/15 = around 0.266667</output>

<result>4/15 = around 0.266667</result>