Alright, let's work through 2649 times 7644 step by step
2649 × 7644 = 7644 × (2649)
+ 7644 × 9 what gives us 68796
+ 7644 × 40 yielding 305760
+ 7644 × 600 yielding 4586400
+ 7644 × 2000 resulting in 15288000

= 20248956
