Alright, let's work through 81709298 times 16338549 step by step
81709298 × 16338549 = 16338549 × (81709298)
+ 16338549 × 8 resulting in 130708392
+ 16338549 × 90 that equals 1470469410
+ 16338549 × 200 which equals 3267709800
+ 16338549 × 9000 resulting in 147046941000
+ 16338549 × 00000 that is equal 0
+ 16338549 × 700000 that equals 11436984300000
+ 16338549 × 1000000 yielding 16338549000000
+ 16338549 × 80000000 producing 1307083920000000

= 1335011369128602
