Alright, let's work through 90477520 times 90543735 step by step
90477520 × 90543735 = 90543735 × (90477520)
+ 90543735 × 0 what gives us 0
+ 90543735 × 20 that equals 1810874700
+ 90543735 × 500 that equals 45271867500
+ 90543735 × 7000 producing 633806145000
+ 90543735 × 70000 which equals 6338061450000
+ 90543735 × 400000 what gives us 36217494000000
+ 90543735 × 0000000 that equals 0
+ 90543735 × 90000000 resulting in 8148936150000000

= 8192172594337200
