Alright, let's work through 89836672 times 77664327 step by step
89836672 × 77664327 = 77664327 × (89836672)
+ 77664327 × 2 producing 155328654
+ 77664327 × 70 that results in 5436502890
+ 77664327 × 600 that equals 46598596200
+ 77664327 × 6000 that is equal 465985962000
+ 77664327 × 30000 which equals 2329929810000
+ 77664327 × 800000 resulting in 62131461600000
+ 77664327 × 9000000 producing 698978943000000
+ 77664327 × 80000000 producing 6213146160000000

= 6977104670799744
