No problem, we've got 1122 and 2815 to multiply
1122 × 2815 = 2815 × (1122)
+ 2815 × 2 what gives us 5630
+ 2815 × 20 what gives us 56300
+ 2815 × 100 which equals 281500
+ 2815 × 1000 resulting in 2815000

= 3158430
