Spring is here, and the farmer uncle watered the fruit trees. On the first day, he watered (1/4) of all the fruit trees in the morning, (3/8) in the afternoon, and (3/10) in the next morning. What fraction of fruit trees? How much is left unwatered?
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(3/8)，第二天上午浇了(3/10)，一共浇了所有果树的几分之几？还有几分之几没浇？
<gadget id="calculator">10 / 40</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">15 / 40</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">12 / 40</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(1/4) + (3/8) + (3/10)</gadget>
<output>37/40 = around 0.925</output>

<gadget id="calculator">1 - (37/40)</gadget>
<output>3/40 = around 0.075</output>

<result>3/40 = around 0.075</result>