When spring comes, the farmer uncle waters the fruit trees. I watered all the fruit trees (1/4) in the morning on the first day, (1/8) in the afternoon, and (3/10) in the morning of the second day. How many have not been watered?
春天到了，农民伯伯给果树浇水．第一天上午浇了所有果树的(1/4)，下午浇了(1/8)，第二天上午浇了(3/10)，还有多少没有浇？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (1/4) - (1/8) - (3/10)</gadget>
<output>13/40 = around 0.325</output>

<result>13/40 = around 0.325</result>