Alright, let's work through 9939 times 8078 step by step
9939 × 8078 = 8078 × (9939)
+ 8078 × 9 that results in 72702
+ 8078 × 30 which equals 242340
+ 8078 × 900 that results in 7270200
+ 8078 × 9000 that results in 72702000

= 80287242
