Ecshop Vietnam Application Error

The application could not run because of the following error:

Type: E_WARNING [2]

Message: Division by zero in /home/thanh/domains/hanghieuvip.vn/public_html/includes/lib_goods.php

Line: 513

Stack trace:

#0 /home/thanh/domains/hanghieuvip.vn/public_html/includes/lib_goods.php(513): ErrorHandler->handleError(2, 'Division by zer...', '/home/thanh/dom...', 513, Array)
#1 /home/thanh/domains/hanghieuvip.vn/public_html/includes/lib_goods.php(558): get_discount('0.00', '1980000.00')
#2 /home/thanh/domains/hanghieuvip.vn/public_html/modules/goods.php(51): get_goods_info(2206)
#3 /home/thanh/domains/hanghieuvip.vn/public_html/index.php(37): include_once('/home/thanh/dom...')
#4 {main}