Alright, let's work through 1998 times 6600 step by step
1998 × 6600 = 6600 × (1998)
+ 6600 × 8 that is equal 52800
+ 6600 × 90 what gives us 594000
+ 6600 × 900 what gives us 5940000
+ 6600 × 1000 that equals 6600000

= 13186800
