footer {
   display: flex;
   justify-content: space-around;
}

let inps = document.querySelectorAll('input'),
		txt = document.querySelector('.box_text');

inps.forEach((item) => {
	item.addEventListener('click', targetItem)
})

function targetItem(event) {
	let target = event.target;
	txt.innerHTML = 'Результат: ' + target.value;
}