Alright, let's work through 83707158 times 43911621 step by step
83707158 × 43911621 = 43911621 × (83707158)
+ 43911621 × 8 that is equal 351292968
+ 43911621 × 50 that equals 2195581050
+ 43911621 × 100 that results in 4391162100
+ 43911621 × 7000 yielding 307381347000
+ 43911621 × 00000 producing 0
+ 43911621 × 700000 that results in 30738134700000
+ 43911621 × 3000000 that results in 131734863000000
+ 43911621 × 80000000 resulting in 3512929680000000

= 3675716997083118
