Alright, let's work through 1720 times 6460 step by step
1720 × 6460 = 6460 × (1720)
+ 6460 × 0 what gives us 0
+ 6460 × 20 resulting in 129200
+ 6460 × 700 resulting in 4522000
+ 6460 × 1000 that is equal 6460000

= 11111200
