Alright, let's work through 3986 times 7524 step by step
3986 × 7524 = 7524 × (3986)
+ 7524 × 6 giving us 45144
+ 7524 × 80 what gives us 601920
+ 7524 × 900 resulting in 6771600
+ 7524 × 3000 what gives us 22572000

= 29990664
