Alright, let's work through 90307170 times 99913347 step by step
90307170 × 99913347 = 99913347 × (90307170)
+ 99913347 × 0 that equals 0
+ 99913347 × 70 producing 6993934290
+ 99913347 × 100 which equals 9991334700
+ 99913347 × 7000 producing 699393429000
+ 99913347 × 00000 what gives us 0
+ 99913347 × 300000 that results in 29974004100000
+ 99913347 × 0000000 that is equal 0
+ 99913347 × 90000000 giving us 8992201230000000

= 9022891612797990
