#include<stdio.h>

int main()
{
  
  int num1numerator = 0,num2numerator = 0,num1denominator = -1,num2denominator = -1;char op = '@';
  // Note : operators allowed are '+' '-' '*'
  printf("Note : operators allowed are '+' '-' '*' \n and NO negatives in numerator or denominator \n Enter input :");
  
  char ch = getchar();
  while( (ch >= '0' && ch <= '9') || ch == '/' || ch == '-' || ch == '+'|| ch == '*' || ch == ' ')
  {
    if(ch == ' ')
    {
      ch = getchar();
      continue;
    }
    if(ch == '-' || ch == '+'|| ch == '*')
    {
      op = ch;
      ch = getchar();
      continue;
    }
    
    if(op == '@')
    {
      if(ch == '/')
      {
	num1denominator = 0;
      }
      else if(num1denominator == -1) // still processing num 1 numerator
      {
	num1numerator = num1numerator * 10 + ch - '0' ;
      }
      else
      {
	num1denominator = num1denominator * 10 + ch - '0' ;
      }
    }
    else
    {
      if(ch == '/')
      {
	num2denominator = 0;
      }
      else if(num2denominator == -1) // still processing num 1 numerator
      {
	num2numerator = num2numerator * 10 + ch - '0' ;
      }
      else
      {
	num2denominator = num2denominator * 10 + ch - '0' ;
      }
    }
    ch = getchar();
  }
  //div1 = div1 /10;div =div/10;
  if(num1denominator == -1 )
    num1denominator = 1;
  if(num2denominator == -1 )
    num2denominator = 1;
  
  float result = 0;
  /*int resultNumerator,resultDenominator,commonDenominator; 
  printf("The number1 : %d/%d   number2 : %d/%d\n",num1numerator,num1denominator,num2numerator,num2denominator);
  if(op == '*')
  {
    resultNumerator = num1numerator * num2numerator;
    resultDenominator = num1denominator * num2denominator;
  }
  if(op == '+' || op == '-')
  {
    commonDenominator = num1denominator * num2denominator;
    if(op == '+')
    {
      resultNumerator = num1numerator * num2denominator + num2numerator * num1denominator;
    }
    if(op == '-')
    {
      resultNumerator = num1numerator * num2denominator - num2numerator * num1denominator;
    }
  }
  */
  if(op == '+')
    result = (num1numerator * 1.0) / (num1denominator*1.0) + (num2numerator*1.0) / (num2denominator*1.0);
  if(op == '-')
    result = (num1numerator*1.0) / (num1denominator*1.0)  - (num2numerator*1.0) / (num2denominator*1.0);
  if(op == '*')
    result = (num1numerator*1.0) / (num1denominator*1.0)  * (num2numerator*1.0) / ( num2denominator*1.0);
 
  
  int integerPart = 0;
  integerPart = result;
  float floatPart = result - integerPart;
  int n = integerPart,div =1;
  printf("result : %f Float part : %f integerPrt : %d|\n Now printing using putchar():  ",result,floatPart,integerPart);
  while(n > 0)
  {
    n = n/10;
    div = div*10;
  }
  div =div/10;
  n = integerPart;
  
  if(result < 0)
    putchar('-');
  while(n>0)
  {
    putchar(n/div + '0');
    n = n/10;
    div = div /10;
  }
  int count = 0;
  
  
  if(floatPart > 0)
  {
    putchar('.');
    while(floatPart > 0 || count < 3)
    {
      int n = floatPart * 10;
      floatPart = floatPart*10 - n;
      putchar(n + '0');
      count++;
      if(count >=3)
	break;
    }
  }
  
  printf("\n");
  return 0;
}