Let's calculate 3879 x 3454
3879 × 3454 = 3454 × (3879)
+ 3454 × 9 producing 31086
+ 3454 × 70 that results in 241780
+ 3454 × 800 producing 2763200
+ 3454 × 3000 that results in 10362000

= 13398066
