Brother and younger brother set off from home and school at the same time and walk toward each other. When they start, their speed ratio is 6:5. After meeting, the brother's speed decreases by 20%, and the younger brother's speed increases by 20%. In this way, when the younger brother arrives When I got home, my brother was still 20 meters away from the school. Ask, how many meters is the distance from the school to home?
兄、弟两人分别从家、学校同时出发，相向而行，出发时他们的速度比是6：5，相遇后，兄的速度减少20%，弟的速度增加20%，这样，当弟到达家时，兄离学校还有20米，问，学校到家一共有几米？
<gadget id="calculator">1 / 55</gadget>
<output>1/55 = around 0.018182</output>

<gadget id="calculator">20 / (1/55)</gadget>
<output>1_100</output>

<result>1_100</result>