We're going to solve 1689 multiplied by 3968
1689 × 3968 = 3968 × (1689)
+ 3968 × 9 that is equal 35712
+ 3968 × 80 producing 317440
+ 3968 × 600 what gives us 2380800
+ 3968 × 1000 that results in 3968000

= 6701952
