Alright, let's work through 8546706 times 78990507 step by step
8546706 × 78990507 = 78990507 × (8546706)
+ 78990507 × 6 that results in 473943042
+ 78990507 × 00 which equals 0
+ 78990507 × 700 resulting in 55293354900
+ 78990507 × 6000 that equals 473943042000
+ 78990507 × 40000 producing 3159620280000
+ 78990507 × 500000 producing 39495253500000
+ 78990507 × 8000000 that equals 631924056000000

= 675108640119942
