Alright, let's work through 78138147 times 47658596 step by step
78138147 × 47658596 = 47658596 × (78138147)
+ 47658596 × 7 giving us 333610172
+ 47658596 × 40 giving us 1906343840
+ 47658596 × 100 that is equal 4765859600
+ 47658596 × 8000 resulting in 381268768000
+ 47658596 × 30000 that is equal 1429757880000
+ 47658596 × 100000 resulting in 4765859600000
+ 47658596 × 8000000 which equals 381268768000000
+ 47658596 × 70000000 producing 3336101720000000

= 3723954380061612
