The speeds of two cars are 65 kilometers per hour and 55 kilometers per hour respectively. The two cars start from A and B at the same time, and when they meet, the fast car travels 20 kilometers longer than the slow car. How many kilometers.
两辆汽车的速度分别为每小时65千米和每小时55千米，两车分别同时从A、B两地相向出发，相遇时快车比慢车多行20千米，那么A、B两地相距多少千米．
<gadget id="calculator">65 + 55</gadget>
<output>120</output>

<gadget id="calculator">65 - 55</gadget>
<output>10</output>

<gadget id="calculator">20 / 10</gadget>
<output>2</output>

<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<result>240</result>