A train A with a length of 150m is running at a speed of 33 m/s, and a train B with a length of 170m is driving behind with a speed of 43 m/s. How many seconds does it take for train B to completely surpass train A?
一列长150m的列车甲以33米/秒的速度行驶，后面开来一列长170m的列车乙，速度是43米/秒，列车乙完全超过列车甲用了多少秒．
<gadget id="calculator">150 + 170</gadget>
<output>320</output>

<gadget id="calculator">43 - 33</gadget>
<output>10</output>

<gadget id="calculator">320 / 10</gadget>
<output>32</output>

<result>32</result>