Alright, let's work through 2555 times 7813 step by step
2555 × 7813 = 7813 × (2555)
+ 7813 × 5 which equals 39065
+ 7813 × 50 that equals 390650
+ 7813 × 500 that is equal 3906500
+ 7813 × 2000 giving us 15626000

= 19962215
