Just use decimal, which can be devided into two smaller parts, a binary one and the other in base 5.
so it'd be like this: ( luka =L, wan = W, ala= A, tu= T)
A, W, T, TW, TT, L / LA, LW, LT, LTW , LTT, W-AA.
For bigger numbers the ala is need if there is no "luka", also ala in '5' is for clarity.
1,234,567,890: W AT ATW ATT LA LW LT LTW LTT AA.
2.718 : T lili LT AW LTW.
3 1/7: TW en W pi pakala LT.
2+2!=5 tu en tu li lon ala e luka.
6-9 = -3 LW "pali lili" LTT la li "nanpa lili" TW.
4×7 = 28 TT "pali mute" LT la li T LTW.
8÷4=2 LTW "pali pakala" TT la li T.
We can also use some weird sound themself to represent a decimal number, as we got 10 consonants (including none)
We can use the series ' k s t n p m j l w. So
0~10: "nanpa pali" a, ka, sa, ta, na, pa, ma, ja, la, wa, ka'a. (nanpa pali=count)