Alright, let's work through 4003 times 6113 step by step
4003 × 6113 = 6113 × (4003)
+ 6113 × 3 producing 18339
+ 6113 × 00 which equals 0
+ 6113 × 000 producing 0
+ 6113 × 4000 giving us 24452000

= 24470339
