Alright, let's work through 7878343 times 23693878 step by step
7878343 × 23693878 = 23693878 × (7878343)
+ 23693878 × 3 that results in 71081634
+ 23693878 × 40 which equals 947755120
+ 23693878 × 300 giving us 7108163400
+ 23693878 × 8000 yielding 189551024000
+ 23693878 × 70000 that results in 1658571460000
+ 23693878 × 800000 yielding 18955102400000
+ 23693878 × 7000000 yielding 165857146000000

= 186668497884154
