Alright, let's work through 47393967 times 82100192 step by step
47393967 × 82100192 = 82100192 × (47393967)
+ 82100192 × 7 yielding 574701344
+ 82100192 × 60 that is equal 4926011520
+ 82100192 × 900 resulting in 73890172800
+ 82100192 × 3000 which equals 246300576000
+ 82100192 × 90000 producing 7389017280000
+ 82100192 × 300000 that is equal 24630057600000
+ 82100192 × 7000000 that is equal 574701344000000
+ 82100192 × 40000000 which equals 3284007680000000

= 3891053790341664
