Alright, let's work through 7944 times 620 step by step
7944 × 620 = 620 × (7944)
+ 620 × 4 resulting in 2480
+ 620 × 40 yielding 24800
+ 620 × 900 which equals 558000
+ 620 × 7000 yielding 4340000

= 4925280
