A cartoon needs to be shown for 2 hours. On the first day, it was shown for (4/5) hours, and on the second day it was shown for (1/4) hours less than the first day. How many hours do you want to put it?
一部动画片要放映2小时，第一天放了(4/5)小时，第二天比第一天少放映(1/4)小时，剩下的第三天放完，第三天还要放多少小时？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) - (1/4)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">2 - (4/5) - (11/20)</gadget>
<output>13/20 = around 0.65</output>

<result>13/20 = around 0.65</result>