A truck drives from City A to City B, traveling 65 kilometers per hour, and travels for 12 hours. It takes 2 hours less to return because of the increased speed. What is the velocity when returning?
一辆货车从甲城开往乙城，每小时行65千米，行驶了12小时，返回时由于速度提高了，少用了2小时．返回时的速度是多少？
<gadget id="calculator">12 - 2</gadget>
<output>10</output>

<gadget id="calculator">12 / 10</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">65 * (6/5)</gadget>
<output>78</output>

<result>78</result>