<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Form Demo</title>
</head>

<body>
    <form method="get" action="/get-thing" style="display: flex; flex-flow: column nowrap; align-items: center;">
        <label>a: <input name="a" type="number"></label>
        <label>b: <input name="b" type="text"></label>
        <input type="submit">
    </form>
</body>

</html>