A = Point(yAxis)
B = Point(xAxis)
f = Segment(A, B)

Tool: 더긴선분
더긴선분[ <점>, <점>, <수> ]
Input: E, F, l
Output: m

F' = Dilate(F, 1 + 1 / l, E)
E' = Dilate(E, 1 + 1 / l, F)
m = Segment(E', F')