how to change the trip meter from kmph to mph on digital read out

Divide the answer by 1.6

as in 120,000km --> 75,000

l think if u check in the car repair book for the model & year of the car that u might have a digital control
chip somewhere in the car. Usually there is more than one dial on the dashboard to read both mile per hour & kilometers.
Kilometers Miles
1 = 0.6
2 = 1.2
3 = 1.8
4 = 2.4
5 = 3.1
6 =3.7
7 = 4.3
8 = 4.9
9 = 5.5
10 = 6.2
20 = 12.4
30 = 18.6
40 = 24.8
50 = 31.0
60 = 37.2
70 = 43.4
80 = 49.7
90 = 55.9
100 = 62.1
1,000 = 621.0

where did you bring it from..?