Alright, let's work through 3870 times 9507 step by step
3870 × 9507 = 9507 × (3870)
+ 9507 × 0 producing 0
+ 9507 × 70 that equals 665490
+ 9507 × 800 producing 7605600
+ 9507 × 3000 producing 28521000

= 36792090
