Alright, let's work through 1653 times 7603 step by step
1653 × 7603 = 7603 × (1653)
+ 7603 × 3 which equals 22809
+ 7603 × 50 what gives us 380150
+ 7603 × 600 producing 4561800
+ 7603 × 1000 what gives us 7603000

= 12567759
