No problem, we've got 2991 and 3947 to multiply
2991 × 3947 = 3947 × (2991)
+ 3947 × 1 that is equal 3947
+ 3947 × 90 that equals 355230
+ 3947 × 900 giving us 3552300
+ 3947 × 2000 what gives us 7894000

= 11805477
