Buna !
d = i*c + r, unde r <i asta e legea impartirii cu rest
Restul poate fi :
1 -> c = r*r = 1*1 = 1 -> d = 9c + r = 10
2 -> c = 4 -> d = 9*4+2 = 28
3 -> c = 9 -> d = 84
4 -> c = 16 -> d = 148
5 -> c = 25 -> d = 260
6 -> c = 36 -> d = 330
7 -> c = 49 -> d = 448
8 -> c = 64 -> d = 584
