Alright, let's work through 90250613 times 13536016 step by step
90250613 × 13536016 = 13536016 × (90250613)
+ 13536016 × 3 yielding 40608048
+ 13536016 × 10 which equals 135360160
+ 13536016 × 600 that equals 8121609600
+ 13536016 × 0000 producing 0
+ 13536016 × 50000 that results in 676800800000
+ 13536016 × 200000 producing 2707203200000
+ 13536016 × 0000000 giving us 0
+ 13536016 × 90000000 that is equal 1218241440000000

= 1221633741577808
