Xiao Wang and Xiao Zhang typed a manuscript at the same time, and it took 5 hours to type this manuscript (5/6). If Xiao Wang plays alone, he can finish playing in 10 hours. I hope that if Xiao Zhang typed it alone, it could be finished in a few hours. (Dangyang City, Hubei Province)
小王和小张同时打一份稿件，5小时打了这份这稿件的(5/6)．如果由小王单独打，10小时可以打完．求如果由小张单独打，几小时可以打完．(湖北当阳市)
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/6) / 5</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/6) - (1/10)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / (1/15)</gadget>
<output>15</output>

<result>15</result>