Alright, let's work through 1648 times 3906 step by step
1648 × 3906 = 3906 × (1648)
+ 3906 × 8 what gives us 31248
+ 3906 × 40 producing 156240
+ 3906 × 600 that results in 2343600
+ 3906 × 1000 what gives us 3906000

= 6437088
