Alright, let's work through 78178057 times 19521526 step by step
78178057 × 19521526 = 19521526 × (78178057)
+ 19521526 × 7 yielding 136650682
+ 19521526 × 50 what gives us 976076300
+ 19521526 × 000 that is equal 0
+ 19521526 × 8000 that results in 156172208000
+ 19521526 × 70000 which equals 1366506820000
+ 19521526 × 100000 which equals 1952152600000
+ 19521526 × 8000000 resulting in 156172208000000
+ 19521526 × 70000000 what gives us 1366506820000000

= 1526154972354982
