Alright, let's work through 97813997 times 43931287 step by step
97813997 × 43931287 = 43931287 × (97813997)
+ 43931287 × 7 producing 307519009
+ 43931287 × 90 which equals 3953815830
+ 43931287 × 900 that is equal 39538158300
+ 43931287 × 3000 resulting in 131793861000
+ 43931287 × 10000 which equals 439312870000
+ 43931287 × 800000 that results in 35145029600000
+ 43931287 × 7000000 giving us 307519009000000
+ 43931287 × 90000000 yielding 3953815830000000

= 4297094774824139
