A batch of 8 (1/4) tons of apples, sold (2/5) of the total on the first day, and (1/4) of the total on the second day, how much is left?
一批苹果8(1/4)吨，第一天卖出了总数的(2/5)，第二天卖出总数的(1/4)，还剩下几分之几？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (2/5) - (1/4)</gadget>
<output>7/20 = around 0.35</output>

<result>7/20 = around 0.35</result>