As character names:

U+2750 UPPER RIGHT DROP-SHADOWED WHITE SQUARE character (❐)

As raw characters:

❐

As a string of HTML entities:

❐

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 157, hex 0x9D, octal \235, binary 10011101
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 144, hex 0x90, octal \220, binary 10010000
This is continuation byte 2, expecting 0 more.

U+2750	UPPER RIGHT DROP-SHADOWED WHITE SQUARE