Alright, let's work through 4115 times 1668 step by step
4115 × 1668 = 1668 × (4115)
+ 1668 × 5 that equals 8340
+ 1668 × 10 that is equal 16680
+ 1668 × 100 producing 166800
+ 1668 × 4000 yielding 6672000

= 6863820
