Alright, let's work through 81980147 times 37779880 step by step
81980147 × 37779880 = 37779880 × (81980147)
+ 37779880 × 7 which equals 264459160
+ 37779880 × 40 producing 1511195200
+ 37779880 × 100 which equals 3777988000
+ 37779880 × 0000 giving us 0
+ 37779880 × 80000 yielding 3022390400000
+ 37779880 × 900000 giving us 34001892000000
+ 37779880 × 1000000 that is equal 37779880000000
+ 37779880 × 80000000 that equals 3022390400000000

= 3097200116042360
