Alright, let's work through 6689 times 7653 step by step
6689 × 7653 = 7653 × (6689)
+ 7653 × 9 giving us 68877
+ 7653 × 80 giving us 612240
+ 7653 × 600 giving us 4591800
+ 7653 × 6000 yielding 45918000

= 51190917
