.box{
        display: flex;
        border: 10px;
    }
    #right{
        background-color: yellow;
        width:200px;
        margin: 10px;
    }
    #middle{
        background-color: azure;
        margin: 10px;
        width:calc(100% - 640px);
        display: flex;
    }
    #left{
        background-color: greenyellow;
        width:400px;
        margin: 10px;
    }
    #input1,button{
        align-items: center;
        justify-content: center;
        margin: 20px;
    }
    #input2{
        margin-right: 10px;
    }