Alright, let's work through 85369878 times 84676272 step by step
85369878 × 84676272 = 84676272 × (85369878)
+ 84676272 × 8 resulting in 677410176
+ 84676272 × 70 producing 5927339040
+ 84676272 × 800 that results in 67741017600
+ 84676272 × 9000 which equals 762086448000
+ 84676272 × 60000 producing 5080576320000
+ 84676272 × 300000 that results in 25402881600000
+ 84676272 × 5000000 that results in 423381360000000
+ 84676272 × 80000000 producing 6774101760000000

= 7228803010134816
