Alright, let's work through 81048634 times 61287781 step by step
81048634 × 61287781 = 61287781 × (81048634)
+ 61287781 × 4 which equals 245151124
+ 61287781 × 30 producing 1838633430
+ 61287781 × 600 that is equal 36772668600
+ 61287781 × 8000 that equals 490302248000
+ 61287781 × 40000 resulting in 2451511240000
+ 61287781 × 000000 which equals 0
+ 61287781 × 1000000 what gives us 61287781000000
+ 61287781 × 80000000 which equals 4903022480000000

= 4967290930941154
