The students in the fifth grade went to visit the Dongguan Exhibition Hall and spent 4 hours in total. Among them, the time spent on the road accounted for (1/5), the rest time accounted for (1/6), and the rest was tour time. How much time was spent on tour? How much?
五年级的同学去参观东莞展览馆，共用去4小时，其中路上用去的时间占(1/5)，休息的时间占(1/6)，剩下的是游览时间，游览的时间占几分之几？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">1 - (1/5) - (1/6)</gadget>
<output>19/30 = around 0.633333</output>

<result>19/30 = around 0.633333</result>