No problem, we've got 6393 and 858 to multiply
6393 × 858 = 858 × (6393)
+ 858 × 3 that results in 2574
+ 858 × 90 giving us 77220
+ 858 × 300 what gives us 257400
+ 858 × 6000 that is equal 5148000

= 5485194
