Code point
U+2A31
Glyph appearance depends on your fonts.
U+2A31
SmU+2A31 MULTIPLICATION SIGN WITH UNDERBAR is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Supplemental Mathematical Operators block.
Choose the representation you need, then copy its value.
U+2A31
10801
⨱
⨱
⨱
E2 A8 B1
2A31
00002A31
%E2%A8%B1
\u2A31
\u2A31
\u2A31
\2A31