Alright, let's work through 6157 times 720 step by step
6157 × 720 = 720 × (6157)
+ 720 × 7 yielding 5040
+ 720 × 50 yielding 36000
+ 720 × 100 yielding 72000
+ 720 × 6000 producing 4320000

= 4433040
