Alright, let's work through 77972057 times 18708039 step by step
77972057 × 18708039 = 18708039 × (77972057)
+ 18708039 × 7 yielding 130956273
+ 18708039 × 50 giving us 935401950
+ 18708039 × 000 giving us 0
+ 18708039 × 2000 producing 37416078000
+ 18708039 × 70000 which equals 1309562730000
+ 18708039 × 900000 resulting in 16837235100000
+ 18708039 × 7000000 which equals 130956273000000
+ 18708039 × 70000000 yielding 1309562730000000

= 1458704283266223
