Alright, let's work through 18218165 times 83516064 step by step
18218165 × 83516064 = 83516064 × (18218165)
+ 83516064 × 5 resulting in 417580320
+ 83516064 × 60 that equals 5010963840
+ 83516064 × 100 yielding 8351606400
+ 83516064 × 8000 producing 668128512000
+ 83516064 × 10000 that results in 835160640000
+ 83516064 × 200000 that equals 16703212800000
+ 83516064 × 8000000 giving us 668128512000000
+ 83516064 × 10000000 producing 835160640000000

= 1521509434102560
