Alright, let's work through 85799381 times 67781004 step by step
85799381 × 67781004 = 67781004 × (85799381)
+ 67781004 × 1 producing 67781004
+ 67781004 × 80 that equals 5422480320
+ 67781004 × 300 that equals 20334301200
+ 67781004 × 9000 that results in 610029036000
+ 67781004 × 90000 producing 6100290360000
+ 67781004 × 700000 that results in 47446702800000
+ 67781004 × 5000000 producing 338905020000000
+ 67781004 × 80000000 that equals 5422480320000000

= 5815568186758524
