<s>
GNOME	B-Language
Calculator	I-Language
,	O
formerly	O
known	O
as	O
gcalctool	B-Language
,	O
is	O
the	O
software	O
calculator	O
integrated	O
with	O
the	O
GNOME	B-Application
desktop	I-Application
environment	I-Application
.	O
</s>
<s>
It	O
is	O
programmed	O
in	O
C	B-Language
and	O
Vala	B-Language
and	O
part	O
of	O
the	O
GNOME	B-Language
Core	I-Language
Applications	I-Language
.	O
</s>
<s>
The	O
GNOME	B-Language
calculator	I-Language
uses	O
the	O
common	O
infix	O
notation	O
for	O
binary	O
functions	O
,	O
such	O
as	O
the	O
four	O
basic	O
arithmetic	O
operations	O
.	O
</s>
<s>
The	O
decimal	O
separator	O
on	O
the	O
number	B-Device
pad	I-Device
is	O
based	O
on	O
the	O
general	O
keyboard	O
layout	O
since	O
version	O
3.12.3	O
.	O
</s>
