Alright, let's work through 84534373 times 11787403 step by step
84534373 × 11787403 = 11787403 × (84534373)
+ 11787403 × 3 yielding 35362209
+ 11787403 × 70 which equals 825118210
+ 11787403 × 300 that equals 3536220900
+ 11787403 × 4000 that is equal 47149612000
+ 11787403 × 30000 giving us 353622090000
+ 11787403 × 500000 producing 5893701500000
+ 11787403 × 4000000 giving us 47149612000000
+ 11787403 × 80000000 which equals 942992240000000

= 996440721903319
