Alright, let's work through 3517 times 5112 step by step
3517 × 5112 = 5112 × (3517)
+ 5112 × 7 that results in 35784
+ 5112 × 10 that equals 51120
+ 5112 × 500 what gives us 2556000
+ 5112 × 3000 producing 15336000

= 17978904
