Alright, let's work through 99809654 times 80336148 step by step
99809654 × 80336148 = 80336148 × (99809654)
+ 80336148 × 4 yielding 321344592
+ 80336148 × 50 which equals 4016807400
+ 80336148 × 600 that results in 48201688800
+ 80336148 × 9000 what gives us 723025332000
+ 80336148 × 00000 which equals 0
+ 80336148 × 800000 giving us 64268918400000
+ 80336148 × 9000000 that is equal 723025332000000
+ 80336148 × 90000000 that equals 7230253320000000

= 8018323135572792
