Alright, let's work through 2513 times 8399 step by step
2513 × 8399 = 8399 × (2513)
+ 8399 × 3 yielding 25197
+ 8399 × 10 that is equal 83990
+ 8399 × 500 that is equal 4199500
+ 8399 × 2000 yielding 16798000

= 21106687
