Description:
------------
<?php
    $a = 3100;
    echo "\$a :".$a."\n";
    $a *= 1.025;
    echo "\$a * 1.025 :".$a."\n";
    echo "round \$a:".round($a)."\n";  //get 3177
    echo "round \$a:".round("$a")."\n"; //get 3178
    $b = "3177.5";
    echo "\$b:".$b."\n";
    echo "round \$b:".round($b)."\n"; //get 3178
?>