and B are several meters apart. It is known that A walks 60 meters per minute and B walks 50 meters per minute. If two people walk towards each other at the same time, they can meet in 3 minutes; if two people walk in the same direction at the same time, A is behind B. So how many minutes can A catch up with B?
甲、乙两人相距若干米，已知甲每分钟走60米，乙每分钟走50米．如果两人同时相对而行，3分钟可以相遇；如果两人同时同向而行，甲在乙后面．那么甲几分钟可以追上乙？
<gadget id="calculator">60 + 50</gadget>
<output>110</output>

<gadget id="calculator">110 * 3</gadget>
<output>330</output>

<gadget id="calculator">60 - 50</gadget>
<output>10</output>

<gadget id="calculator">330 / 10</gadget>
<output>33</output>

<result>33</result>