Cars A and B travel towards each other from A and B. After 3 hours, the distance between the two cars is 120 kilometers. If they drive at this speed for another 3 hours, the distance between the two cars is still 120 kilometers. Find the distance between places A and B.
甲、乙两车从A、B两地相向而行，3小时后两车相距120千米，照这样的速度又行驶3小时，仍然相距120千米．求A、B两地的路程．
<gadget id="calculator">120 + 120</gadget>
<output>240</output>

<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<gadget id="calculator">240 + 120</gadget>
<output>360</output>

<result>360</result>