Alright, let's work through 6790 times 4157 step by step
6790 × 4157 = 4157 × (6790)
+ 4157 × 0 which equals 0
+ 4157 × 90 that results in 374130
+ 4157 × 700 producing 2909900
+ 4157 × 6000 that equals 24942000

= 28226030
