Alright, let's work through 18998597 times 59971287 step by step
18998597 × 59971287 = 59971287 × (18998597)
+ 59971287 × 7 what gives us 419799009
+ 59971287 × 90 that results in 5397415830
+ 59971287 × 500 that is equal 29985643500
+ 59971287 × 8000 yielding 479770296000
+ 59971287 × 90000 that is equal 5397415830000
+ 59971287 × 900000 producing 53974158300000
+ 59971287 × 8000000 producing 479770296000000
+ 59971287 × 10000000 giving us 599712870000000

= 1139370313284339
