Alright, let's work through 2652 times 9678 step by step
2652 × 9678 = 9678 × (2652)
+ 9678 × 2 giving us 19356
+ 9678 × 50 producing 483900
+ 9678 × 600 that is equal 5806800
+ 9678 × 2000 yielding 19356000

= 25666056
