Alright, let's work through 4109 times 1978 step by step
4109 × 1978 = 1978 × (4109)
+ 1978 × 9 that equals 17802
+ 1978 × 00 which equals 0
+ 1978 × 100 producing 197800
+ 1978 × 4000 resulting in 7912000

= 8127602
