why is it setting my local storage to 1400 in html code example

Example 1: localstorage javascript

localStorage.setItem(key, val);
var val = localStorage.getItem(key);
localStorage.removeItem(key);
localStorage.clear();

Example 2: localstorage

// using in HTML5 (frontend)

// set
localStorage.setItem('users', 'vilh'); 

users = [
	{
    	id: 1,
        name: 'vilh',
    },
    {
    	id: 2,
        name: 'zidane'
    },
]

// set string 
localStorage.setItem('users', users);	// stored objects
localStorage.setItem('users', JSON.stringify(users));	// stored string

// get
var retrievedUsername = localStorage.getItem('users');