Let's calculate 6391 x 2513
6391 × 2513 = 2513 × (6391)
+ 2513 × 1 that results in 2513
+ 2513 × 90 that results in 226170
+ 2513 × 300 that equals 753900
+ 2513 × 6000 that results in 15078000

= 16060583
