No problem, we've got 3963 and 2122 to multiply
3963 × 2122 = 2122 × (3963)
+ 2122 × 3 that results in 6366
+ 2122 × 60 what gives us 127320
+ 2122 × 900 which equals 1909800
+ 2122 × 3000 that results in 6366000

= 8409486
