Alright, let's work through 86063819 times 49790994 step by step
86063819 × 49790994 = 49790994 × (86063819)
+ 49790994 × 9 resulting in 448118946
+ 49790994 × 10 which equals 497909940
+ 49790994 × 800 which equals 39832795200
+ 49790994 × 3000 resulting in 149372982000
+ 49790994 × 60000 giving us 2987459640000
+ 49790994 × 000000 that results in 0
+ 49790994 × 6000000 which equals 298745964000000
+ 49790994 × 80000000 giving us 3983279520000000

= 4285203095446086
