A and B are running a 100-meter race. When A crosses the finish line, B is exactly 20 meters behind A. In the second race, A's starting line is 20 meters behind the original starting line, and their respective speeds are different in the two races. Change, ask the result of the second race is how many meters behind A when A reaches the finish line
甲、乙两人进行100米赛跑，甲冲过终点线时，乙正好在甲后面20米处，第二次比赛时甲的起跑线比原起跑线推后20米，且两次比赛中各自速度不变，问第二次比赛结果是甲到终点线时，乙正好在甲后面多少米
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">20 * (1/5)</gadget>
<output>4</output>

<result>4</result>