<?php
require_once '../functions.php';
$number = pow(2, 50);
$result = 1;
for ($i = 1; $i <= 20; $i++) {
$result = stringMultiply($number, $result);
}
$result = array_sum(str_split($result));
echo $result;
<?php
require_once '../functions.php';
$factorial100 = 1;
$numbers = range(1, 100);
foreach ($numbers as $number) {
$factorial100 = stringMultiply($number, $factorial100);
}
$result = array_sum(str_split($factorial100));
echo $result;
