Alright, let's work through 6439 times 134 step by step
6439 × 134 = 134 × (6439)
+ 134 × 9 that results in 1206
+ 134 × 30 resulting in 4020
+ 134 × 400 what gives us 53600
+ 134 × 6000 giving us 804000

= 862826
