Alright, let's work through 5199 times 2539 step by step
5199 × 2539 = 2539 × (5199)
+ 2539 × 9 giving us 22851
+ 2539 × 90 what gives us 228510
+ 2539 × 100 that results in 253900
+ 2539 × 5000 which equals 12695000

= 13200261
