Alright, let's work through 78558876 times 77979934 step by step
78558876 × 77979934 = 77979934 × (78558876)
+ 77979934 × 6 giving us 467879604
+ 77979934 × 70 resulting in 5458595380
+ 77979934 × 800 that equals 62383947200
+ 77979934 × 8000 that is equal 623839472000
+ 77979934 × 50000 that is equal 3898996700000
+ 77979934 × 500000 yielding 38989967000000
+ 77979934 × 8000000 giving us 623839472000000
+ 77979934 × 70000000 resulting in 5458595380000000

= 6126015965594184
