Alright, let's work through 9900 times 9045 step by step
9900 × 9045 = 9045 × (9900)
+ 9045 × 0 yielding 0
+ 9045 × 00 giving us 0
+ 9045 × 900 that is equal 8140500
+ 9045 × 9000 yielding 81405000

= 89545500
