Alright, let's work through 1821 times 3259 step by step
1821 × 3259 = 3259 × (1821)
+ 3259 × 1 that equals 3259
+ 3259 × 20 which equals 65180
+ 3259 × 800 yielding 2607200
+ 3259 × 1000 that results in 3259000

= 5934639
