Alright, let's work through 8636 times 6789 step by step
8636 × 6789 = 6789 × (8636)
+ 6789 × 6 yielding 40734
+ 6789 × 30 producing 203670
+ 6789 × 600 that equals 4073400
+ 6789 × 8000 yielding 54312000

= 58629804
