Alright, let's work through 1150 times 9900 step by step
1150 × 9900 = 9900 × (1150)
+ 9900 × 0 what gives us 0
+ 9900 × 50 what gives us 495000
+ 9900 × 100 giving us 990000
+ 9900 × 1000 which equals 9900000

= 11385000
