Alright, let's work through 9900 times 4712 step by step
9900 × 4712 = 4712 × (9900)
+ 4712 × 0 that is equal 0
+ 4712 × 00 that equals 0
+ 4712 × 900 what gives us 4240800
+ 4712 × 9000 that equals 42408000

= 46648800
