Alright, let's work through 3213 times 6478 step by step
3213 × 6478 = 6478 × (3213)
+ 6478 × 3 which equals 19434
+ 6478 × 10 what gives us 64780
+ 6478 × 200 yielding 1295600
+ 6478 × 3000 which equals 19434000

= 20813814
