Alright, let's work through 6434 times 9925 step by step
6434 × 9925 = 9925 × (6434)
+ 9925 × 4 that is equal 39700
+ 9925 × 30 producing 297750
+ 9925 × 400 giving us 3970000
+ 9925 × 6000 that results in 59550000

= 63857450
