Alright, let's work through 90523956 times 79215805 step by step
90523956 × 79215805 = 79215805 × (90523956)
+ 79215805 × 6 resulting in 475294830
+ 79215805 × 50 what gives us 3960790250
+ 79215805 × 900 yielding 71294224500
+ 79215805 × 3000 what gives us 237647415000
+ 79215805 × 20000 giving us 1584316100000
+ 79215805 × 500000 yielding 39607902500000
+ 79215805 × 0000000 producing 0
+ 79215805 × 90000000 that results in 7129422450000000

= 7170928046324580
