No problem, we've got 3900 and 1169 to multiply
3900 × 1169 = 1169 × (3900)
+ 1169 × 0 producing 0
+ 1169 × 00 what gives us 0
+ 1169 × 900 that results in 1052100
+ 1169 × 3000 giving us 3507000

= 4559100
