Alright, let's work through 65780025 times 78335119 step by step
65780025 × 78335119 = 78335119 × (65780025)
+ 78335119 × 5 that is equal 391675595
+ 78335119 × 20 yielding 1566702380
+ 78335119 × 000 that equals 0
+ 78335119 × 0000 which equals 0
+ 78335119 × 80000 that results in 6266809520000
+ 78335119 × 700000 what gives us 54834583300000
+ 78335119 × 5000000 what gives us 391675595000000
+ 78335119 × 60000000 giving us 4700107140000000

= 5152886086197975
