Summer is here, I cut a watermelon and ate it (3/8), and I ate less watermelon than my father (1/4). How much of this watermelon did Dad eat?
夏天到了，明明切了一个西瓜吃了(3/8)，比爸爸少吃了这个西瓜的(1/4)．爸爸吃了这个西瓜的几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">(3/8) + (1/4)</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>