HTMLify

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: black;
    font-family: "Poppins", sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 60px;
}


.main-calc-container {
    height: 400px;
    border-radius: 23px;
    width: 320px;
    background-color: white;
    border: 3px solid black;
    
}

.display-part-res {
    background-color: rgb(231, 221, 221);
    height: 15%;
    width: 100%;
    
    border-radius: 23px;
    box-shadow: 3px 7px 5px 0px rgba(124,116,116,0.53);
    -webkit-box-shadow: 3px 7px 5px 0px rgba(124,116,116,0.53);
    -moz-box-shadow: 3px 7px 5px 0px rgba(124,116,116,0.53);

}

.button-sec-part {
    margin-top: 10px;
    background-color: antiquewhite;
    height: 82%;
    border-radius: 23px;
    border-radius: 23px;
    margin-top: 20px;
}

.first-column {
    background-color: antiquewhite;
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 100%;
    height: 60px;
    
}

#first button{
    width: 50px;
    height: 50px;
    background-color: white;
    border: none;
    border-radius: 50%;
    font-weight: 900;
    font-size: 1rem;
}

.second-column {
    background-color: antiquewhite;
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 100%;
    height: 60px;
}

#second button{
    width: 50px;
    height: 50px;
    background-color: white;
    border: none;
    border-radius: 50%;
    font-weight: 900;
    font-size: 1rem;
}


.third-column {
    background-color: antiquewhite;
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 100%;
    height: 60px;
}

#third button{
    width: 50px;
    height: 50px;
    background-color: white;
    border: none;
    border-radius: 50%;
    font-weight: 900;
    font-size: 1rem;
}


.fourth-column {
    background-color: antiquewhite;
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 100%;
    height: 60px;
}

#fouth button{
    width: 50px;
    height: 50px;
    background-color: white;
    border: none;
    border-radius: 50%;
    font-weight: 900;
    font-size: 1rem;
}


.fifth-column {
    background-color: antiquewhite;
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 100%;
    height: 60px;
}

#fifth button{
    width: 50px;
    height: 50px;
    background-color: white;
    border: none;
    border-radius: 50%;
    font-weight: 900;
    font-size: 1rem;
}