A PHP Error was encountered

Severity: Warning

Message: Division by zero

Filename: frontend/flashcards.php

Line Number: 19

Backtrace:

File: /home/ngoaingSV8B/ngoaingu.vn/public_html/application/views/site/frontend/flashcards.php
Line: 19
Function: _error_handler

File: /home/ngoaingSV8B/ngoaingu.vn/public_html/application/views/site/layout.php
Line: 19
Function: view

File: /home/ngoaingSV8B/ngoaingu.vn/public_html/application/controllers/Topic.php
Line: 101
Function: view

File: /home/ngoaingSV8B/ngoaingu.vn/public_html/index.php
Line: 315
Function: require_once