Alright, let's work through 2720 times 5777 step by step
2720 × 5777 = 5777 × (2720)
+ 5777 × 0 yielding 0
+ 5777 × 20 which equals 115540
+ 5777 × 700 giving us 4043900
+ 5777 × 2000 what gives us 11554000

= 15713440
