No problem, we've got 1641 and 7489 to multiply
1641 × 7489 = 7489 × (1641)
+ 7489 × 1 what gives us 7489
+ 7489 × 40 giving us 299560
+ 7489 × 600 that equals 4493400
+ 7489 × 1000 yielding 7489000

= 12289449
