C :

#include<stdio.h>
main() {
	int a,m;
	m=(700000-28)/39;
	a=10*m+7;
	printf("%d\n",a);
}

C++ :

#include <iostream>
using namespace std;

int main(){
    cout<<179487<<endl; 
}

Python :

for i in range(100007,1000000):
   s=str(i)
   m1=s[0:5]
   num1=int(m1)*10+7
   num2=700000+int(m1)
   if num2==4*num1:
       print (num1)
       break