A and B are walking in the same direction, A is 120 meters in front of B, A walks 60 meters per minute, B walks 70 meters per minute, how many minutes can B catch up with A?
甲、乙两人同向而行，甲在乙前面120米处，甲每分钟走60米，乙每分钟走70米，乙多少分钟后能追上甲？
<gadget id="calculator">70 - 60</gadget>
<output>10</output>

<gadget id="calculator">120 / 10</gadget>
<output>12</output>

<result>12</result>