To process a part, A needs (5/12) hours, and B needs 0.25 hours, how much more hours does A need than B?
加工一种零件，甲需要(5/12)小时，乙需要0.25小时，甲比乙多用多少小时？
<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(5/12) - 0.25</gadget>
<output>0.166667</output>

<result>0.166667</result>