We're going to solve 1721 multiplied by 6660
1721 × 6660 = 6660 × (1721)
+ 6660 × 1 which equals 6660
+ 6660 × 20 that is equal 133200
+ 6660 × 700 what gives us 4662000
+ 6660 × 1000 yielding 6660000

= 11461860
