No problem, we've got 3990 and 2947 to multiply
3990 × 2947 = 2947 × (3990)
+ 2947 × 0 what gives us 0
+ 2947 × 90 that equals 265230
+ 2947 × 900 producing 2652300
+ 2947 × 3000 that results in 8841000

= 11758530
