Alright, let's work through 90081140 times 79699705 step by step
90081140 × 79699705 = 79699705 × (90081140)
+ 79699705 × 0 yielding 0
+ 79699705 × 40 that is equal 3187988200
+ 79699705 × 100 resulting in 7969970500
+ 79699705 × 1000 producing 79699705000
+ 79699705 × 80000 what gives us 6375976400000
+ 79699705 × 000000 giving us 0
+ 79699705 × 0000000 that results in 0
+ 79699705 × 90000000 giving us 7172973450000000

= 7179440284063700
