Alright, let's work through 78282497 times 58071718 step by step
78282497 × 58071718 = 58071718 × (78282497)
+ 58071718 × 7 what gives us 406502026
+ 58071718 × 90 yielding 5226454620
+ 58071718 × 400 that equals 23228687200
+ 58071718 × 2000 what gives us 116143436000
+ 58071718 × 80000 what gives us 4645737440000
+ 58071718 × 200000 giving us 11614343600000
+ 58071718 × 8000000 that is equal 464573744000000
+ 58071718 × 70000000 resulting in 4065020260000000

= 4545999090119846
