Alright, let's work through 6438 times 6195 step by step
6438 × 6195 = 6195 × (6438)
+ 6195 × 8 what gives us 49560
+ 6195 × 30 giving us 185850
+ 6195 × 400 that equals 2478000
+ 6195 × 6000 which equals 37170000

= 39883410
