Alright, let's work through 4117 times 3945 step by step
4117 × 3945 = 3945 × (4117)
+ 3945 × 7 that is equal 27615
+ 3945 × 10 what gives us 39450
+ 3945 × 100 resulting in 394500
+ 3945 × 4000 what gives us 15780000

= 16241565
