body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

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

.container {
    text-align: center;
    width: 400px;
    margin-inline: auto;
}

.inner-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: 100px;
}

.box {
    border: 1px solid black;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: 0.5s;
    font-size: 2rem;
}

#box-1,
#box-2,
#box-3,
#box-7,
#box-11,
#box-15,
#box-17{
    background-color: darkorange;
}
#box-1:hover,
#box-2:hover,
#box-3:hover,
#box-7:hover,
#box-11:hover,
#box-15:hover,
#box-17:hover{
    background-color: white;
}
#box-1{
    grid-column: 2 span;
}
#box-16{
    grid-column: span 3;
}

.box{
    background-color: #ccc;
    cursor: pointer;
}
.box:hover{
    background-color: white;
}
#calcBox {
    text-align: right;
    width: 100%;
    font-size: 2rem;
    padding: 30px 5px;
    border: none;
    background-color: black;
    color: white;
}