Alright, let's work through 90090326 times 10238729 step by step
90090326 × 10238729 = 10238729 × (90090326)
+ 10238729 × 6 that results in 61432374
+ 10238729 × 20 which equals 204774580
+ 10238729 × 300 producing 3071618700
+ 10238729 × 0000 producing 0
+ 10238729 × 90000 yielding 921485610000
+ 10238729 × 000000 that equals 0
+ 10238729 × 0000000 resulting in 0
+ 10238729 × 90000000 that is equal 921485610000000

= 922410433435654
