Alright, let's work through 3529 times 6250 step by step
3529 × 6250 = 6250 × (3529)
+ 6250 × 9 that results in 56250
+ 6250 × 20 that results in 125000
+ 6250 × 500 what gives us 3125000
+ 6250 × 3000 giving us 18750000

= 22056250
