Very easy

#include <stdio.h>
//from 10 first number should be found, where summ of its digits value times more than
//number itself(this instance it's 7 times, summ*7==hold_number

int main()
{   int summ,hold_number,number,flag = 1;
    hold_number = 9;


    while(flag)
    {
        number= ++hold_number;
        summ = number%10;
      //printf("number is %d\n",number);
        while(number)
        {
            number/=10;
            summ+=number%10;
            //printf("num-%d,summ-%d\t",number,summ);
        }
        //printf("\n");
        if(summ*7==hold_number)
            printf("hold_number is %d\n",hold_number),flag=0;
        if(!(hold_number%1000))
            printf("middle is %d\n",hold_number);
    }

    return 0;
}