Alright, let's work through 2879 times 1252 step by step
2879 × 1252 = 1252 × (2879)
+ 1252 × 9 that is equal 11268
+ 1252 × 70 that equals 87640
+ 1252 × 800 that is equal 1001600
+ 1252 × 2000 resulting in 2504000

= 3604508
