Alright, let's work through 1660 times 1198 step by step
1660 × 1198 = 1198 × (1660)
+ 1198 × 0 yielding 0
+ 1198 × 60 that is equal 71880
+ 1198 × 600 yielding 718800
+ 1198 × 1000 that results in 1198000

= 1988680
