--- a/rollbot.py	Fri Jun 03 11:23:45 2016 +0800
+++ b/rollbot.py	Fri Jun 03 11:36:03 2016 +0800
@@ -38,9 +38,11 @@
                 times = match.group('times')
                 if times is None:
                     times = 1
-                sides = match.group('sides')
+                else:
+                    times = int(times)
+                sides = int(match.group('sides'))
                 if times > 0 and sides > 1:
-                    rolls, total = self.roll(int(times), int(sides))
+                    rolls, total = self.roll(times, sides)
                     return self.format(rolls, total)
 
         return '%s usage: %s' % (self.name, self.usage())