fix: template fix for null_card
diff --git a/erpnext/www/lms/program.html b/erpnext/www/lms/program.html
index 6c144d4..271b781 100644
--- a/erpnext/www/lms/program.html
+++ b/erpnext/www/lms/program.html
@@ -77,7 +77,7 @@
 				{{ card(course) }}
 			{% endfor %}
 			{% if courses %}
-				{% for n in range((courses|length)%3) %}
+				{% for n in range( (3 - (courses|length)) %3) %}
 					{{ null_card() }}
 				{% endfor %}
 			{% endif %}