Alright, let's work through 3123 times 5174 step by step
3123 × 5174 = 5174 × (3123)
+ 5174 × 3 giving us 15522
+ 5174 × 20 giving us 103480
+ 5174 × 100 that is equal 517400
+ 5174 × 3000 resulting in 15522000

= 16158402
