feat(php): 1A (not passed yet)

.gitignore

@@ -0,0 +1 @@
+.idea

php/1A.php

@@ -0,0 +1,7 @@
+<?php
+fscanf(STDIN, "%d %d %d", $n, $m, $a);
+
+$tilesN = intdiv($n + $a - 1, $a);
+$tilesM = intdiv($m + $a - 1, $a);
+
+echo $tilesN * $tilesM;