The fruit shop shipped 100 boxes of pears, sold all (1/5) on the first day, and sold more (1/5) on the second day than the first day. How much is left unsold?
水果店运来100箱梨，第一天卖出全部的(1/5)，第二天卖出的比第一天多(1/5)．还剩几分之几没卖完？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(1/5) * (6/5)</gadget>
<output>6/25 = around 0.24</output>

<gadget id="calculator">1 - (1/5) - (6/25)</gadget>
<output>14/25 = around 0.56</output>

<result>14/25 = around 0.56</result>