123ABC:
(1*16^5) + (2*16^4) + (3*16^3) + (10*16^2) + (11*16^4) + (12*16^0) = 1194684

746DEF:
(7*16^5) + (4*16^4) + (6*16^3) + (13*16^2) + (14*16^4) + (15*16^0) = 7630319