Alright, let's work through 1964 times 3128 step by step
1964 × 3128 = 3128 × (1964)
+ 3128 × 4 which equals 12512
+ 3128 × 60 what gives us 187680
+ 3128 × 900 which equals 2815200
+ 3128 × 1000 that is equal 3128000

= 6143392
