how to make to type only 80 in search box

I want to make a search box where users can only type up to its 80% by default coming cross icon here just little bit its right I want to add a search icon how to do this. This is my searchbox move cross icon little bit left to add another search icon
I want to make search box like this

#searchBtn {
                margin-left: 0px;
                color: rgb(0, 0, 0);
                background-color: rgba(252, 174, 158, 0);
                border: none;
            }
            #searchBox {
                margin-left: 0px;
    
            } 
    
    <div class="searchbox">
            <input type="search" name="" id="searchBox">
            <button id="searchBtn" type="submit"><i class="far fa-search"></i></button>
     </div>