The uncle of the cinema went to Inner Mongolia last month and showed two science education films for the children in Inner Mongolia. The first film is 615 meters long and runs for 24.6 minutes. The second film is 780 meters long, which is more than the first film. how many minutes?
电影院的叔叔上个月去了趟内蒙古，为内蒙古的小朋友放了两部科学教育片，第一部影片长615米，放映24.6分钟，第二部影片长780米，要比第一部多放映多少分钟？
<gadget id="calculator">615 / 24.6</gadget>
<output>25</output>

<gadget id="calculator">780 / 25</gadget>
<output>156/5 = around 31.2</output>

<gadget id="calculator">(156/5) - 24.6</gadget>
<output>6.6</output>

<result>6.6</result>