Alright, let's work through 4013 times 913 step by step
4013 × 913 = 913 × (4013)
+ 913 × 3 that equals 2739
+ 913 × 10 giving us 9130
+ 913 × 000 giving us 0
+ 913 × 4000 which equals 3652000

= 3663869
