Alright, let's work through 4145 times 7678 step by step
4145 × 7678 = 7678 × (4145)
+ 7678 × 5 which equals 38390
+ 7678 × 40 yielding 307120
+ 7678 × 100 giving us 767800
+ 7678 × 4000 what gives us 30712000

= 31825310
