Two groups process the same number of parts, the first group processes 68 per hour, and the second group processes 80 per hour. The first group worked 1.5 hours longer than the second group. Q: How many hours did the second group process?
两个小组加工同样数量的零件，第一小组每小时加工68个，第二小组每小时加工80个．第一小组要比第二小组多加工1.5小时．问：第二小组加工多少小时？
<gadget id="calculator">80 - 68</gadget>
<output>12</output>

<gadget id="calculator">1.5 / 12</gadget>
<output>0.125</output>

<gadget id="calculator">68 * 0.125</gadget>
<output>8.5</output>

<result>8.5</result>