Alright, let's work through 90799140 times 89191535 step by step
90799140 × 89191535 = 89191535 × (90799140)
+ 89191535 × 0 what gives us 0
+ 89191535 × 40 that results in 3567661400
+ 89191535 × 100 giving us 8919153500
+ 89191535 × 9000 that is equal 802723815000
+ 89191535 × 90000 which equals 8027238150000
+ 89191535 × 700000 that results in 62434074500000
+ 89191535 × 0000000 that is equal 0
+ 89191535 × 90000000 what gives us 8027238150000000

= 8098514673279900
