Alright, let's work through 78915440 times 30458138 step by step
78915440 × 30458138 = 30458138 × (78915440)
+ 30458138 × 0 that equals 0
+ 30458138 × 40 which equals 1218325520
+ 30458138 × 400 which equals 12183255200
+ 30458138 × 5000 which equals 152290690000
+ 30458138 × 10000 yielding 304581380000
+ 30458138 × 900000 yielding 27412324200000
+ 30458138 × 8000000 which equals 243665104000000
+ 30458138 × 70000000 yielding 2132069660000000

= 2403617361850720
