A is 16 kilometers behind B, and the two are walking in the same direction at the same time, A travels 18 kilometers per hour, B travels 10 kilometers per hour, how many hours does A catch up with B?
甲在乙的后面16千米处，两人同时同向而行，甲每小时行18千米，乙每小时行10千米，多少小时甲追上乙．
<gadget id="calculator">18 - 10</gadget>
<output>8</output>

<gadget id="calculator">16 / 8</gadget>
<output>2</output>

<result>2</result>