Alright, let's work through 8186 times 8840 step by step
8186 × 8840 = 8840 × (8186)
+ 8840 × 6 that equals 53040
+ 8840 × 80 yielding 707200
+ 8840 × 100 producing 884000
+ 8840 × 8000 which equals 70720000

= 72364240
