The program for calculating money went into a stupor?

Question

JavaScript

Good afternoon, I just started learning js - tell me how to finish the program. In appearance, the idea is simple, but I don’t understand how to complete it: the user entered a number in the field / the program saved it / then, when another number was entered, a new one was added to the saved value, and so on .....
https://codepen.io/shnopik87/pen /XZLOmp
Thank you)

Answer 1

const result = document.querySelector(".money-block__value");
const field = document.querySelector(".field");

document.querySelector(".btn").addEventListener("click", () => {
  result.textContent = (+result.textContent + +field.value);
});

Answer 2

Your "saved" number is not saved at all.
I redid:
https://codepen.io/anon/pen/wyLOKz?editors=1111