Alright, let's work through 83784143 times 43549977 step by step
83784143 × 43549977 = 43549977 × (83784143)
+ 43549977 × 3 that is equal 130649931
+ 43549977 × 40 which equals 1741999080
+ 43549977 × 100 which equals 4354997700
+ 43549977 × 4000 producing 174199908000
+ 43549977 × 80000 resulting in 3483998160000
+ 43549977 × 700000 yielding 30484983900000
+ 43549977 × 3000000 that results in 130649931000000
+ 43549977 × 80000000 producing 3483998160000000

= 3648797500614711
