Alright, let's work through 78178523 times 17840272 step by step
78178523 × 17840272 = 17840272 × (78178523)
+ 17840272 × 3 that results in 53520816
+ 17840272 × 20 that equals 356805440
+ 17840272 × 500 producing 8920136000
+ 17840272 × 8000 what gives us 142722176000
+ 17840272 × 70000 producing 1248819040000
+ 17840272 × 100000 which equals 1784027200000
+ 17840272 × 8000000 yielding 142722176000000
+ 17840272 × 70000000 yielding 1248819040000000

= 1394726114878256
