Alright, let's work through 2639 times 6475 step by step
2639 × 6475 = 6475 × (2639)
+ 6475 × 9 producing 58275
+ 6475 × 30 that equals 194250
+ 6475 × 600 giving us 3885000
+ 6475 × 2000 that results in 12950000

= 17087525
