Alright, let's work through 20086330 times 9937423 step by step
20086330 × 9937423 = 9937423 × (20086330)
+ 9937423 × 0 producing 0
+ 9937423 × 30 what gives us 298122690
+ 9937423 × 300 producing 2981226900
+ 9937423 × 6000 what gives us 59624538000
+ 9937423 × 80000 giving us 794993840000
+ 9937423 × 000000 that results in 0
+ 9937423 × 0000000 yielding 0
+ 9937423 × 20000000 which equals 198748460000000

= 199606357727590
