Two teams, A and B, jointly build a canal with a length of 2100 meters. Team A builds 90 meters per day, and Team B builds 85 meters per day. The two teams work from one end at the same time. How many meters did team A exceed the midpoint when they met?
甲乙两队合修一条长2100米的水渠，甲队每天修90米，乙队每天修85米，两队各从一端同时相向施工．相遇时，甲队超过中点多少米？
<gadget id="calculator">90 + 85</gadget>
<output>175</output>

<gadget id="calculator">2_100 / 175</gadget>
<output>12</output>

<gadget id="calculator">90 * 12</gadget>
<output>1_080</output>

<gadget id="calculator">2_100 / 2</gadget>
<output>1_050</output>

<gadget id="calculator">1_080 - 1_050</gadget>
<output>30</output>

<result>30</result>