Alright, let's work through 1964 times 3871 step by step
1964 × 3871 = 3871 × (1964)
+ 3871 × 4 that is equal 15484
+ 3871 × 60 resulting in 232260
+ 3871 × 900 producing 3483900
+ 3871 × 1000 giving us 3871000

= 7602644
