Alright, let's work through 6398 times 4258 step by step
6398 × 4258 = 4258 × (6398)
+ 4258 × 8 which equals 34064
+ 4258 × 90 that is equal 383220
+ 4258 × 300 which equals 1277400
+ 4258 × 6000 giving us 25548000

= 27242684
