Alright, let's work through 19836542 times 81473184 step by step
19836542 × 81473184 = 81473184 × (19836542)
+ 81473184 × 2 producing 162946368
+ 81473184 × 40 resulting in 3258927360
+ 81473184 × 500 that results in 40736592000
+ 81473184 × 6000 giving us 488839104000
+ 81473184 × 30000 yielding 2444195520000
+ 81473184 × 800000 which equals 65178547200000
+ 81473184 × 9000000 that results in 733258656000000
+ 81473184 × 10000000 that equals 814731840000000

= 1616146236289728
