Code point
U+3340
Glyph appearance depends on your fonts.
U+3340
So<square> 30DD 30F3 30C9U+3340 SQUARE PONDO is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the CJK Compatibility block.
Choose the representation you need, then copy its value.
U+3340
13120
㍀
㍀
E3 8D 80
3340
00003340
%E3%8D%80
\u3340
\u3340
\u3340
\3340