Alright, let's work through 6689 times 3671 step by step
6689 × 3671 = 3671 × (6689)
+ 3671 × 9 which equals 33039
+ 3671 × 80 that is equal 293680
+ 3671 × 600 that results in 2202600
+ 3671 × 6000 yielding 22026000

= 24555319
