The minute hand on the clock goes from 1 to 5 for ((())/(())) hours.
钟面上的分针从1走到5，走了((())/(()))小时．
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">5 / 60</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">4 * (1/12)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>