Alright, let's work through 1250 times 3433 step by step
1250 × 3433 = 3433 × (1250)
+ 3433 × 0 that equals 0
+ 3433 × 50 that equals 171650
+ 3433 × 200 which equals 686600
+ 3433 × 1000 which equals 3433000

= 4291250
