Alright, let's work through 87974523 times 81343219 step by step
87974523 × 81343219 = 81343219 × (87974523)
+ 81343219 × 3 giving us 244029657
+ 81343219 × 20 producing 1626864380
+ 81343219 × 500 giving us 40671609500
+ 81343219 × 4000 giving us 325372876000
+ 81343219 × 70000 resulting in 5694025330000
+ 81343219 × 900000 that results in 73208897100000
+ 81343219 × 7000000 resulting in 569402533000000
+ 81343219 × 80000000 yielding 6507457520000000

= 7156130890809537
