Two people, A and B, race around a circular square with a circumference of 1200 meters. It is known that A walks 125 meters per minute, and B's speed is 1.2 times that of A. Now A is 400 meters behind B. Ask: B catches up with A. How many minutes will it take.
甲、乙二人绕周长为1200米的环形广场竞走，已知甲每分钟走125米，乙的速度是甲的1.2倍，现在甲在乙的后面400米，问：乙追上甲还需多少分钟．
<gadget id="calculator">1_200 - 400</gadget>
<output>800</output>

<gadget id="calculator">125 * 1.2</gadget>
<output>150</output>

<gadget id="calculator">150 - 125</gadget>
<output>25</output>

<gadget id="calculator">800 / 25</gadget>
<output>32</output>

<result>32</result>