We're going to solve 1689 multiplied by 1980
1689 × 1980 = 1980 × (1689)
+ 1980 × 9 giving us 17820
+ 1980 × 80 what gives us 158400
+ 1980 × 600 that equals 1188000
+ 1980 × 1000 producing 1980000

= 3344220
