Alright, let's work through 8273 times 7890 step by step
8273 × 7890 = 7890 × (8273)
+ 7890 × 3 that is equal 23670
+ 7890 × 70 giving us 552300
+ 7890 × 200 what gives us 1578000
+ 7890 × 8000 yielding 63120000

= 65273970
