Write a program to divide a big integer by a integer number

#include<stdio.h>
#include<string.h>
#include<math.h>
#define MAX 1000


int call_div(char number[],long div,char result[])
{
int len=strlen(number);
int now; long extra;
char Res[MAX];
for(now=0,extra=0;now<len;now++)
{
extra=extra*10 + (number[now]-'0');
Res[now]=extra / div +'0';
extra%=div;
}
Res[now]='\0';
for(now=0;Res[now]=='0';now++);
strcpy(result, &Res[now]);
if(strlen(result)==0)
strcpy(result, "0");
return extra;
}


int main()
{
char fir[MAX],res[MAX];
long sec,remainder;
while(scanf("%s%ld",&fir,&sec)==2)
{
if(sec==0)
printf("Divide by 0 error\n");
else
{
remainder=call_div(fir,sec,res);
int len=strlen(res);
for(int i=0;i<len;i++)
printf("%c",res[i]);
printf("\t%ld",remainder);
printf("\n");
}
}
return 0;
}