Alright, let's work through 3930 times 5223 step by step
3930 × 5223 = 5223 × (3930)
+ 5223 × 0 that is equal 0
+ 5223 × 30 yielding 156690
+ 5223 × 900 yielding 4700700
+ 5223 × 3000 that is equal 15669000

= 20526390
