Alright, let's work through 3607 times 1390 step by step
3607 × 1390 = 1390 × (3607)
+ 1390 × 7 resulting in 9730
+ 1390 × 00 that is equal 0
+ 1390 × 600 producing 834000
+ 1390 × 3000 producing 4170000

= 5013730
