Alright, let's work through 80513326 times 99284389 step by step
80513326 × 99284389 = 99284389 × (80513326)
+ 99284389 × 6 what gives us 595706334
+ 99284389 × 20 that equals 1985687780
+ 99284389 × 300 yielding 29785316700
+ 99284389 × 3000 yielding 297853167000
+ 99284389 × 10000 giving us 992843890000
+ 99284389 × 500000 that equals 49642194500000
+ 99284389 × 0000000 that equals 0
+ 99284389 × 80000000 producing 7942751120000000

= 7993716378267814
