Alright, let's work through 80287042 times 10816286 step by step
80287042 × 10816286 = 10816286 × (80287042)
+ 10816286 × 2 producing 21632572
+ 10816286 × 40 that equals 432651440
+ 10816286 × 000 yielding 0
+ 10816286 × 7000 resulting in 75714002000
+ 10816286 × 80000 resulting in 865302880000
+ 10816286 × 200000 that results in 2163257200000
+ 10816286 × 0000000 producing 0
+ 10816286 × 80000000 resulting in 865302880000000

= 868407608366012
