Code point
U+228C
Glyph appearance depends on your fonts.
U+228C
SmU+228C MULTISET is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Mathematical Operators block.
Choose the representation you need, then copy its value.
U+228C
8844
⊌
⊌
E2 8A 8C
228C
0000228C
%E2%8A%8C
\u228C
\u228C
\u228C
\228C