Alright, let's work through 2720 times 7689 step by step
2720 × 7689 = 7689 × (2720)
+ 7689 × 0 resulting in 0
+ 7689 × 20 yielding 153780
+ 7689 × 700 giving us 5382300
+ 7689 × 2000 that is equal 15378000

= 20914080
