Alright, let's work through 78807308 times 53285873 step by step
78807308 × 53285873 = 53285873 × (78807308)
+ 53285873 × 8 that equals 426286984
+ 53285873 × 00 what gives us 0
+ 53285873 × 300 that is equal 15985761900
+ 53285873 × 7000 that results in 373001111000
+ 53285873 × 00000 giving us 0
+ 53285873 × 800000 that equals 42628698400000
+ 53285873 × 8000000 that is equal 426286984000000
+ 53285873 × 70000000 that equals 3730011110000000

= 4199316205559884
