Number bases
Human number system: base 10
Base (radix) k = 10, digits di
Assume number of digits: 5
weight 10(n-1) 103 102 101 100
digits 3 7 2 9 4
   i = n-1
number = R(di * ki)  = (3 * 10000) + (7 * 1000) + (2 * 100) + (9 * 10) + (4 * 1)
     i = 0  = 37294ten