Alright, let's work through 3328 times 6491 step by step
3328 × 6491 = 6491 × (3328)
+ 6491 × 8 giving us 51928
+ 6491 × 20 yielding 129820
+ 6491 × 300 which equals 1947300
+ 6491 × 3000 yielding 19473000

= 21602048
