Alright, let's work through 6429 times 1515 step by step
6429 × 1515 = 1515 × (6429)
+ 1515 × 9 that results in 13635
+ 1515 × 20 resulting in 30300
+ 1515 × 400 which equals 606000
+ 1515 × 6000 producing 9090000

= 9739935
