No problem, we've got 1645 and 4792 to multiply
1645 × 4792 = 4792 × (1645)
+ 4792 × 5 which equals 23960
+ 4792 × 40 giving us 191680
+ 4792 × 600 which equals 2875200
+ 4792 × 1000 that is equal 4792000

= 7882840
