Even assuming that iches is a different way of spelling inches, the question cannot be answered since you have not specified 90 WHAT! 90 millimetres, 90 light years or something between the two?
2
36
my butt iches
11.22 inches
76.2 cm
22.86 cm
1 yard = 36 iches. That's bigger than 28 iches.
0.787 inches
There are 108 inches in 3 yards
4 inches = 10.16 cm
104 meters is 4,094.5 inches.
5,280 feet X 12 = 63,360 inches