Replace0by5 Javascript

function replace0by5(number){
  if(number === 0){
    return 5;
  }
  var result=number,decimalPlace=1;
  while(number > 0){
    if(number % 10 === 0){
      var newNumber = 5*decimalPlace;
      result += newNumber;
    }
    number = Math.floor(number/10);
    decimalPlace *=10;
  }
  return result;
}

console.log(replace0by5(10500));