Alright, let's work through 2639 times 9766 step by step
2639 × 9766 = 9766 × (2639)
+ 9766 × 9 giving us 87894
+ 9766 × 30 that results in 292980
+ 9766 × 600 yielding 5859600
+ 9766 × 2000 yielding 19532000

= 25772474
