Alright, let's work through 42451040 times 99888964 step by step
42451040 × 99888964 = 99888964 × (42451040)
+ 99888964 × 0 which equals 0
+ 99888964 × 40 that is equal 3995558560
+ 99888964 × 000 producing 0
+ 99888964 × 1000 producing 99888964000
+ 99888964 × 50000 that results in 4994448200000
+ 99888964 × 400000 which equals 39955585600000
+ 99888964 × 2000000 giving us 199777928000000
+ 99888964 × 40000000 what gives us 3995558560000000

= 4240390406322560
