Alright, let's work through 3910 times 624 step by step
3910 × 624 = 624 × (3910)
+ 624 × 0 that results in 0
+ 624 × 10 what gives us 6240
+ 624 × 900 resulting in 561600
+ 624 × 3000 that results in 1872000

= 2439840
