Alright, let's work through 80975490 times 90876535 step by step
80975490 × 90876535 = 90876535 × (80975490)
+ 90876535 × 0 which equals 0
+ 90876535 × 90 that results in 8178888150
+ 90876535 × 400 that is equal 36350614000
+ 90876535 × 5000 yielding 454382675000
+ 90876535 × 70000 which equals 6361357450000
+ 90876535 × 900000 producing 81788881500000
+ 90876535 × 0000000 yielding 0
+ 90876535 × 80000000 that results in 7270122800000000

= 7358771951127150
