Alright, let's work through 1233 times 633 step by step
1233 × 633 = 633 × (1233)
+ 633 × 3 yielding 1899
+ 633 × 30 that is equal 18990
+ 633 × 200 which equals 126600
+ 633 × 1000 producing 633000

= 780489
