$(function() {
    $("#multiple").change(function() {
        var multipleValues = $("#multiple").val() || "";
        var result = "";
        if (multipleValues != "") {
            var aVal = multipleValues.toString().split(",");
            var count = $("#multiple :selected").length;
            $.each(aVal, function(i, value) {
                result += "<div>";
                result += "<input type='text' name='opval" + (parseInt(i) + 1) + "' value='" + value.trim() + "'>";
                result += "<input type='text' name='optext" + (parseInt(i) + 1) + "' value='" + $("#multiple").find("option[value=" + value + "]").text().trim() + "'>";
                result += "<input type='text' name='option" + (parseInt(i) + 1) + "' value='' '>"; //result should display in this textbox .i.e (result= total_price/count )
                result += "</div>";
            });
        }
        //Set Result
        $("#result").html(result);

    });

    $("#toal_price").blur(function() {
        var multipleValues = $("#multiple").val() || "";
        var total_price = $("#toal_price").val();
        var aVal = multipleValues.toString().split(",");
        var count = $("#multiple :selected").length;
        if (multipleValues != "") {
            $.each(aVal, function(i, value) {
                var price = total_price / count;
                $("input[name=option" + (parseInt(i) + 1) + "]").val(price);
            });
        }

    });
});

Setting Validate Copy Format

#multiple{
  margin-bottom:10px;
  border:1px solid #333;
  background:#efefef;
  color:#000;
}
#result input{
  margin-left:5px;
  border:1px solid #333;
  background:#a4c4f4;
  margin-top:5px;
}

Setting Validate Copy Format

<form id="frm">
  <select id="multiple" multiple="multiple" style="width: 120px;height: 120px;">
    <option value="1" >
      Ashutosh
    </option>
    <option value="6">
      Jems Bond
    </option>
    <option value="7">
      Danial Crack
    </option>
    <option value="8">
      Dan Brown
    </option>
    <option value="9">
      Angilina Jolly
    </option>
  </select>
  <br/>
  
  
  <!--User will  enter the total_price in this textbox -->
  <div id="result">
  </div>
</form>

Copy Format

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