No problem, we've got 1263 and 3123 to multiply
1263 × 3123 = 3123 × (1263)
+ 3123 × 3 giving us 9369
+ 3123 × 60 what gives us 187380
+ 3123 × 200 that results in 624600
+ 3123 × 1000 resulting in 3123000

= 3944349
