Alright, let's work through 86676579 times 67413316 step by step
86676579 × 67413316 = 67413316 × (86676579)
+ 67413316 × 9 giving us 606719844
+ 67413316 × 70 giving us 4718932120
+ 67413316 × 500 producing 33706658000
+ 67413316 × 6000 that results in 404479896000
+ 67413316 × 70000 producing 4718932120000
+ 67413316 × 600000 that results in 40447989600000
+ 67413316 × 6000000 giving us 404479896000000
+ 67413316 × 80000000 that results in 5393065280000000

= 5843155609925964
