Alright, let's work through 4689 times 423 step by step
4689 × 423 = 423 × (4689)
+ 423 × 9 yielding 3807
+ 423 × 80 which equals 33840
+ 423 × 600 that is equal 253800
+ 423 × 4000 that equals 1692000

= 1983447
