Adding Numbers beween spacing

Wow great Title I tell you, hello again Excel experts I know this will come to you very easy I know it, OK here it is...,

I got a number, OK lets make it every even "5","10", "15" est and i add another one beside it to be added 0.01 every "5" times, so ok i'll make it a bit better some how,
(A1)
lv 1
=1
lv 2
=2
lv 3
=3
lv 4
=4
lv 5---(A2)----(A3)
=5 + 0.01 = 5.01

(A1)
lv 6.01
=6
lv 7.01
=7
lv 8.01
=8
lv 9.01
=9
lv 10--------(A2)------(A3)
=10.01 + 0.01 = 10.02 est.

I don't wanna make it hard, if you can try, if not its not a problem I can just do it manually. this was frustrating for me, any help will be greatly appreciated

um I had one idea that did and one that did not work, 1. to do it manually or 2. (that did not work) us "=IF function"