Alright, let's work through 1660 times 2031 step by step
1660 × 2031 = 2031 × (1660)
+ 2031 × 0 what gives us 0
+ 2031 × 60 giving us 121860
+ 2031 × 600 what gives us 1218600
+ 2031 × 1000 yielding 2031000

= 3371460
