From A to B, it takes 10 hours for car A to complete the journey, and 15 hours for car B to complete the journey. Now the two cars depart from A and B at the same time. When they met, car A traveled 60km longer than car B. Question: How many kilometers are there between A and B?
从A地到B地，甲车行完全程要10小时，乙车行完全程要15小时，现在两车分别从A、B两地同时出发．相遇时，甲车比乙车多行了60km．问：A、B两地相距多少km？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">60 / (1/5)</gadget>
<output>300</output>

<result>300</result>