how can i make a functon of this event listener, so i have dont have to write same code again and agian for every button

Question

const plus = document.getElementById('plus');

const mul = document.getElementById('mul');

const mode = document.getElementById('mode');

const sub = document.getElementById('sub');

const div = document.getElementById('div');

let string = " ";

mul.addEventListener('click', (e) => {

string = string + e.target.innerHTML;

input.value = string;

});

mode.addEventListener('click', (e) => {

string = string + e.target.innerHTML;

input.value = string;

});

plus.addEventListener('click', (e) => {

string = string + e.target.innerHTML;

input.value = string;

});

sub.addEventListener('click', (e) => {

string = string + e.target.innerHTML;

input.value = string;

});

div.addEventListener('click', (e) => {

string = string + e.target.innerHTML;

input.value = string;

});