Alright, let's work through 2311 times 5399 step by step
2311 × 5399 = 5399 × (2311)
+ 5399 × 1 which equals 5399
+ 5399 × 10 what gives us 53990
+ 5399 × 300 that equals 1619700
+ 5399 × 2000 that is equal 10798000

= 12477089
