Alright, let's work through 5720 times 2139 step by step
5720 × 2139 = 2139 × (5720)
+ 2139 × 0 resulting in 0
+ 2139 × 20 giving us 42780
+ 2139 × 700 that equals 1497300
+ 2139 × 5000 what gives us 10695000

= 12235080
