A and B start from two places 60 kilometers apart at the same time and walk towards each other. A walks 3 kilometers per hour, B walks 2 kilometers per hour, and a dog starts from the same place at the same time, and walks 5 kilometers per hour. km. When the dog meets B, it turns back and walks towards A, and when it meets A, it turns back and walks towards B... The dog goes back and forth between A and B in this way until A and B meet. Ask how many kilometers the dog has traveled way?
甲乙两人同时从相距60千米的两地出发，相对而行，甲每小时走3千米，乙每小时走2千米，与甲同时同地出发的还有一条狗，每小时走5千米．狗碰到乙后就回头向甲走去，碰到甲后又回头向乙走去…，这条狗就这样往返于甲乙两人之间直到甲乙相遇为止，问这条狗走了多少千米的路？
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">60 / 5</gadget>
<output>12</output>

<gadget id="calculator">5 * 12</gadget>
<output>60</output>

<result>60</result>