<?php
function jiecheng($i) {
  $s = '1';
  $a = 1;
  echo $s . '=' . $a . "\n";
  for ($c = 2; $c <= $i; $c++) {
    $s = $c . '*' . $s;
    $a *= $c;
    echo $s . '=' . $a . "\n";
  }
}
?>