Alright, let's work through 99800063 times 19760393 step by step
99800063 × 19760393 = 19760393 × (99800063)
+ 19760393 × 3 that is equal 59281179
+ 19760393 × 60 that results in 1185623580
+ 19760393 × 000 that results in 0
+ 19760393 × 0000 giving us 0
+ 19760393 × 00000 that equals 0
+ 19760393 × 800000 yielding 15808314400000
+ 19760393 × 9000000 which equals 177843537000000
+ 19760393 × 90000000 what gives us 1778435370000000

= 1972088466304759
