Alright, let's work through 7874953 times 19438979 step by step
7874953 × 19438979 = 19438979 × (7874953)
+ 19438979 × 3 that is equal 58316937
+ 19438979 × 50 that results in 971948950
+ 19438979 × 900 producing 17495081100
+ 19438979 × 4000 resulting in 77755916000
+ 19438979 × 70000 giving us 1360728530000
+ 19438979 × 800000 yielding 15551183200000
+ 19438979 × 7000000 giving us 136072853000000

= 153081045992987
