If A alone takes 6 hours to complete a project, and B alone takes 8 hours to complete, how much less time will A use than B?
一项工程，甲单独做要6小时完成，乙单独做要8小时完成，甲用的时间比乙少多少．
<gadget id="calculator">8 - 6</gadget>
<output>2</output>

<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>