Alright, let's work through 99420374 times 89288720 step by step
99420374 × 89288720 = 89288720 × (99420374)
+ 89288720 × 4 that is equal 357154880
+ 89288720 × 70 yielding 6250210400
+ 89288720 × 300 that results in 26786616000
+ 89288720 × 0000 that is equal 0
+ 89288720 × 20000 what gives us 1785774400000
+ 89288720 × 400000 that results in 35715488000000
+ 89288720 × 9000000 yielding 803598480000000
+ 89288720 × 90000000 which equals 8035984800000000

= 8877117936381280
