No problem, we've got 4509 and 7643 to multiply
4509 × 7643 = 7643 × (4509)
+ 7643 × 9 that equals 68787
+ 7643 × 00 which equals 0
+ 7643 × 500 what gives us 3821500
+ 7643 × 4000 yielding 30572000

= 34462287
