We're going to solve 1981 multiplied by 2169
1981 × 2169 = 2169 × (1981)
+ 2169 × 1 producing 2169
+ 2169 × 80 that results in 173520
+ 2169 × 900 what gives us 1952100
+ 2169 × 1000 yielding 2169000

= 4296789
