No problem, we've got 3977 and 3115 to multiply
3977 × 3115 = 3115 × (3977)
+ 3115 × 7 what gives us 21805
+ 3115 × 70 which equals 218050
+ 3115 × 900 that results in 2803500
+ 3115 × 3000 that results in 9345000

= 12388355
