Alright, let's work through 49939878 times 86359799 step by step
49939878 × 86359799 = 86359799 × (49939878)
+ 86359799 × 8 yielding 690878392
+ 86359799 × 70 that is equal 6045185930
+ 86359799 × 800 that is equal 69087839200
+ 86359799 × 9000 resulting in 777238191000
+ 86359799 × 30000 giving us 2590793970000
+ 86359799 × 900000 that is equal 77723819100000
+ 86359799 × 9000000 that results in 777238191000000
+ 86359799 × 40000000 that is equal 3454391960000000

= 4312797826164522
