Alright, let's work through 1789 times 7645 step by step
1789 × 7645 = 7645 × (1789)
+ 7645 × 9 resulting in 68805
+ 7645 × 80 producing 611600
+ 7645 × 700 resulting in 5351500
+ 7645 × 1000 producing 7645000

= 13676905
