Alright, let's work through 81068598 times 67487528 step by step
81068598 × 67487528 = 67487528 × (81068598)
+ 67487528 × 8 what gives us 539900224
+ 67487528 × 90 yielding 6073877520
+ 67487528 × 500 that equals 33743764000
+ 67487528 × 8000 giving us 539900224000
+ 67487528 × 60000 that equals 4049251680000
+ 67487528 × 000000 resulting in 0
+ 67487528 × 1000000 producing 67487528000000
+ 67487528 × 80000000 that equals 5399002240000000

= 5471119277445744
