No problem, we've got 1665 and 4789 to multiply
1665 × 4789 = 4789 × (1665)
+ 4789 × 5 what gives us 23945
+ 4789 × 60 that results in 287340
+ 4789 × 600 that equals 2873400
+ 4789 × 1000 that results in 4789000

= 7973685
