No problem, we've got 6415 and 2045 to multiply
6415 × 2045 = 2045 × (6415)
+ 2045 × 5 what gives us 10225
+ 2045 × 10 giving us 20450
+ 2045 × 400 that is equal 818000
+ 2045 × 6000 which equals 12270000

= 13118675
