Dad bought a watermelon weighing (5/2) kilograms, daughter ate (1/4) of this watermelon, and mother ate (1/3) of this watermelon, what fraction is left?
爸爸买回一个西瓜重(5/2)千克，女儿吃了这个西瓜的(1/4)，妈妈吃了这个西瓜的(1/3)，还剩下几分之几？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/4) - (1/3)</gadget>
<output>5/12 = around 0.416667</output>

<result>5/12 = around 0.416667</result>