Alright, let's work through 2605 times 3901 step by step
2605 × 3901 = 3901 × (2605)
+ 3901 × 5 yielding 19505
+ 3901 × 00 giving us 0
+ 3901 × 600 that is equal 2340600
+ 3901 × 2000 that equals 7802000

= 10162105
