Alright, let's work through 80898427 times 97068991 step by step
80898427 × 97068991 = 97068991 × (80898427)
+ 97068991 × 7 that equals 679482937
+ 97068991 × 20 producing 1941379820
+ 97068991 × 400 that results in 38827596400
+ 97068991 × 8000 that is equal 776551928000
+ 97068991 × 90000 yielding 8736209190000
+ 97068991 × 800000 yielding 77655192800000
+ 97068991 × 0000000 which equals 0
+ 97068991 × 80000000 yielding 7765519280000000

= 7852728682377157
