Alright, let's work through 5019 times 866 step by step
5019 × 866 = 866 × (5019)
+ 866 × 9 that is equal 7794
+ 866 × 10 which equals 8660
+ 866 × 000 what gives us 0
+ 866 × 5000 which equals 4330000

= 4346454
