Someone asks such a question, two people A and B walk towards each other at the same time, the distance is 100 kilometers, A walks 6 kilometers per hour, and B walks 4 kilometers per hour. There is always a time to meet. A takes a dog and walks 10 kilometers per hour. The dog walks faster than people and starts with A. When it meets B, it walks in the direction of A, and when it meets A, it goes in the direction of B again. Ask: How many kilometers did the dog walk in total?
有人提出这样一个问题，甲、乙两人同时相对而行，距离为100千米，甲每小时走6千米，乙每小时走4千米．总有一个时间会碰面．甲带着一只狗，每小时走10千米，狗走得比人快，同甲一起出发，碰到乙时，它往甲方向走，碰到甲它又往乙方向走．问：这只狗一共走了多少千米？
<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">100 / 10</gadget>
<output>10</output>

<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<result>100</result>