<?php
$string = "1427  0   

   876652098643267843 
5276538";

echo $string . "\n------------------------------------\n";

$trash = explode(" ", $string);

foreach ($trash as $value) {
	//echo "$value \n";
	if (is_numeric($value)) {
		$result = round(sqrt($value), 4);
		echo $result . "\n";
	}	
}