A project can be completed by A alone in 6 hours and B alone in 4 hours. A alone completes the project ((())/(())) every hour.
一项工程，甲单独做6小时完成，乙单独做4小时完成．甲单独做每小时完成这项工程的((())/(()))．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>