Alright, let's work through 7507 times 857 step by step
7507 × 857 = 857 × (7507)
+ 857 × 7 that results in 5999
+ 857 × 00 giving us 0
+ 857 × 500 that is equal 428500
+ 857 × 7000 yielding 5999000

= 6433499
