Alright, let's work through 90099003 times 20162507 step by step
90099003 × 20162507 = 20162507 × (90099003)
+ 20162507 × 3 resulting in 60487521
+ 20162507 × 00 that equals 0
+ 20162507 × 000 resulting in 0
+ 20162507 × 9000 that is equal 181462563000
+ 20162507 × 90000 resulting in 1814625630000
+ 20162507 × 000000 producing 0
+ 20162507 × 0000000 that is equal 0
+ 20162507 × 90000000 what gives us 1814625630000000

= 1816621778680521
