Alright, let's work through 6391 times 4216 step by step
6391 × 4216 = 4216 × (6391)
+ 4216 × 1 that equals 4216
+ 4216 × 90 giving us 379440
+ 4216 × 300 that results in 1264800
+ 4216 × 6000 what gives us 25296000

= 26944456
