A job alone takes 10 hours, and B can only complete (5/6) of this job in the same time, how many hours can two people work together to complete it now?
一件工作，甲单独做要用10小时，乙在相同的时间内只能完成这件工作的(5/6)，现在两人合做几小时可以完成？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/6) / 10</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/10) + (1/12)</gadget>
<output>11/60 = around 0.183333</output>

<gadget id="calculator">1 / (11/60)</gadget>
<output>60/11 = around 5.454545</output>

<result>60/11 = around 5.454545</result>