One job, 4 hours to complete (6/7) of the total amount of work, according to this calculation, how many hours did it take to complete the total amount of work? (answer with ratio)
一件工作，4小时完成工作总量的(6/7)，照这样计算，完成工作总量一共用了多少小时？(用比例解答)
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">4 / (6/7)</gadget>
<output>14/3 = around 4.666667</output>

<result>14/3 = around 4.666667</result>