Alright, let's work through 9001 times 1670 step by step
9001 × 1670 = 1670 × (9001)
+ 1670 × 1 which equals 1670
+ 1670 × 00 that equals 0
+ 1670 × 000 yielding 0
+ 1670 × 9000 yielding 15030000

= 15031670
