Alright, let's work through 90692819 times 80123743 step by step
90692819 × 80123743 = 80123743 × (90692819)
+ 80123743 × 9 resulting in 721113687
+ 80123743 × 10 resulting in 801237430
+ 80123743 × 800 giving us 64098994400
+ 80123743 × 2000 that equals 160247486000
+ 80123743 × 90000 giving us 7211136870000
+ 80123743 × 600000 giving us 48074245800000
+ 80123743 × 0000000 which equals 0
+ 80123743 × 90000000 that equals 7211136870000000

= 7266648121501517
