Alright, let's work through 2600 times 6789 step by step
2600 × 6789 = 6789 × (2600)
+ 6789 × 0 which equals 0
+ 6789 × 00 that equals 0
+ 6789 × 600 producing 4073400
+ 6789 × 2000 resulting in 13578000

= 17651400
