Alright, let's work through 6445 times 3694 step by step
6445 × 3694 = 3694 × (6445)
+ 3694 × 5 producing 18470
+ 3694 × 40 giving us 147760
+ 3694 × 400 resulting in 1477600
+ 3694 × 6000 yielding 22164000

= 23807830
