Alright, let's work through 2600 times 5267 step by step
2600 × 5267 = 5267 × (2600)
+ 5267 × 0 what gives us 0
+ 5267 × 00 that is equal 0
+ 5267 × 600 resulting in 3160200
+ 5267 × 2000 yielding 10534000

= 13694200
