Alright, let's work through 78192978 times 90166465 step by step
78192978 × 90166465 = 90166465 × (78192978)
+ 90166465 × 8 resulting in 721331720
+ 90166465 × 70 that equals 6311652550
+ 90166465 × 900 that equals 81149818500
+ 90166465 × 2000 that is equal 180332930000
+ 90166465 × 90000 that results in 8114981850000
+ 90166465 × 100000 producing 9016646500000
+ 90166465 × 8000000 that results in 721331720000000
+ 90166465 × 70000000 yielding 6311652550000000

= 7050384414082770
