Alright, let's work through 3301 times 3945 step by step
3301 × 3945 = 3945 × (3301)
+ 3945 × 1 which equals 3945
+ 3945 × 00 that equals 0
+ 3945 × 300 yielding 1183500
+ 3945 × 3000 that is equal 11835000

= 13022445
