.calculadora {
    position: fixed;
    top: 400px;
    right: 10px;
    width: 300px; /* Aproximadamente 8cm */
    height: 300px;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 10px;
    border: 1px solid #000;
    z-index: 1000;
    display: grid;
    grid-template-rows: repeat(5, 1fr);
    grid-template-columns: repeat(2, 1fr);
    justify-items: left;
        align-items: center;
}

body {
    font-family: Arial, sans-serif;
    margin: 5px;
}

h1 {
    text-align: center;
}