On a certain day in summer, the ratio of night time to day time is 5:7, how many hours is the daytime on this day?
夏季的某一天，夜间与白天的时间比是5：7，这天白天是多少小时．
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">24 * (7/12)</gadget>
<output>14</output>

<result>14</result>