Alright, let's work through 5163 times 3945 step by step
5163 × 3945 = 3945 × (5163)
+ 3945 × 3 yielding 11835
+ 3945 × 60 that is equal 236700
+ 3945 × 100 that is equal 394500
+ 3945 × 5000 which equals 19725000

= 20368035
