We're going to solve 2644 multiplied by 2126
2644 × 2126 = 2126 × (2644)
+ 2126 × 4 what gives us 8504
+ 2126 × 40 yielding 85040
+ 2126 × 600 which equals 1275600
+ 2126 × 2000 producing 4252000

= 5621144
