Simple express server to add 2 numbers

addition-express.js

const express = require("express");
const bodyParser = require('body-parser');

const app = express();
// parse application/x-www-form-urlencoded
app.use(bodyParser.urlencoded({ extended: false }))

app.get("/", (req, res) => {
    res.status(200).send(`<h2>Guessing game</h2>
    Click here to get <a href="/addition">started</a>
    `)
})

app.get("/addition", (req, res) => {
    res.status(200).send(`<form method="POST" action="/result">
    <div>
    <label for="number1">Enter number 1</label>
    <input type="text" name="number1" />
    </div>
    <div>
    <label for="number2">Enter number 2</label>
    <input type="text" name="number2" />
    </div>
    <div>
    <input type="submit" value="Add" />
    </div>
    </form>`)
})

app.post("/result", (req, res) => {
    const value = +(req.body.number1) + (+(req.body.number2));
    res.status(200).send(`The result is ${value}. Click here to add some <a href="/addition">more</a>`)
})
app.listen(4000, () => {
    console.log(`Server started on port 4000`);
})