Alright, let's work through 19941255 times 99762731 step by step
19941255 × 99762731 = 99762731 × (19941255)
+ 99762731 × 5 giving us 498813655
+ 99762731 × 50 what gives us 4988136550
+ 99762731 × 200 that results in 19952546200
+ 99762731 × 1000 yielding 99762731000
+ 99762731 × 40000 that results in 3990509240000
+ 99762731 × 900000 that results in 89786457900000
+ 99762731 × 9000000 yielding 897864579000000
+ 99762731 × 10000000 which equals 997627310000000

= 1989394058367405
