Alright, let's work through 1959 times 423 step by step
1959 × 423 = 423 × (1959)
+ 423 × 9 that is equal 3807
+ 423 × 50 producing 21150
+ 423 × 900 which equals 380700
+ 423 × 1000 what gives us 423000

= 828657
