Code point
U+324B
Glyph appearance depends on your fonts.
U+324B
NoU+324B CIRCLED NUMBER FORTY ON BLACK SQUARE is a Unicode 16.0.0 character in the Other Number category. It belongs to the Enclosed CJK Letters and Months block.
Choose the representation you need, then copy its value.
U+324B
12875
㉋
㉋
E3 89 8B
324B
0000324B
%E3%89%8B
\u324B
\u324B
\u324B
\324B