Alright, let's work through 3543 times 150 step by step
3543 × 150 = 150 × (3543)
+ 150 × 3 resulting in 450
+ 150 × 40 what gives us 6000
+ 150 × 500 that results in 75000
+ 150 × 3000 producing 450000

= 531450
