Alright, let's work through 6789 times 8216 step by step
6789 × 8216 = 8216 × (6789)
+ 8216 × 9 what gives us 73944
+ 8216 × 80 producing 657280
+ 8216 × 700 which equals 5751200
+ 8216 × 6000 which equals 49296000

= 55778424
