Alright, let's work through 89171876 times 79982335 step by step
89171876 × 79982335 = 79982335 × (89171876)
+ 79982335 × 6 that is equal 479894010
+ 79982335 × 70 that results in 5598763450
+ 79982335 × 800 resulting in 63985868000
+ 79982335 × 1000 producing 79982335000
+ 79982335 × 70000 which equals 5598763450000
+ 79982335 × 100000 that results in 7998233500000
+ 79982335 × 9000000 what gives us 719841015000000
+ 79982335 × 80000000 giving us 6398586800000000

= 7132174858810460
