Alright, let's work through 3930 times 656 step by step
3930 × 656 = 656 × (3930)
+ 656 × 0 that is equal 0
+ 656 × 30 giving us 19680
+ 656 × 900 producing 590400
+ 656 × 3000 resulting in 1968000

= 2578080
