Alright, let's work through 78587344 times 16374475 step by step
78587344 × 16374475 = 16374475 × (78587344)
+ 16374475 × 4 producing 65497900
+ 16374475 × 40 that equals 654979000
+ 16374475 × 300 which equals 4912342500
+ 16374475 × 7000 what gives us 114621325000
+ 16374475 × 80000 yielding 1309958000000
+ 16374475 × 500000 producing 8187237500000
+ 16374475 × 8000000 what gives us 130995800000000
+ 16374475 × 70000000 yielding 1146213250000000

= 1286826499644400
