INSTALLED_APPS = (
    ...
    'django_templatetags_ext',
    ...
)

{% load templatehelper %}

{{ googol|googolformat }}
{{ googol|googolformat:ndigits }}

{{ googol|googolformat2 }}
{{ googol|googolformat2:ndigits }}

{{ price|fen2yuan }}
{{ price|fen2yuan:ndigits }}

{{ value|truncatechars2:length }}
{{ value|truncatechars2:'length,truncate' }}

{{ value|truncatewidth:length }}
{{ value|truncatewidth:'length,truncate' }}

{{ value|remove_line_break }}
{{ value|remove_line_break:repl }}