#kalk1, #kalk2, #kalk3 {
    width: 400px;
    border: 1pt solid green;
    border-radius: 15px;
    background-color: antiquewhite;
}
input[type="number"] {
    width: 80px;
    height: 15px;
    border: 1px solid #ccc;
    background-color: #f7f7f7;
    color: #333;
    appearance: none;
}

input[type="number"]:focus,
input[type="number"]:hover {
    border: 1px solid #999;
}