Alright, let's work through 86223663 times 20086373 step by step
86223663 × 20086373 = 20086373 × (86223663)
+ 20086373 × 3 that results in 60259119
+ 20086373 × 60 that is equal 1205182380
+ 20086373 × 600 that is equal 12051823800
+ 20086373 × 3000 which equals 60259119000
+ 20086373 × 20000 producing 401727460000
+ 20086373 × 200000 giving us 4017274600000
+ 20086373 × 6000000 that equals 120518238000000
+ 20086373 × 80000000 that results in 1606909840000000

= 1731920656444299
