8400 is a pure number, with no units associated so it is impossible to answer the question in a sensible way.
0.84 m is very much smaller than 8400 kilometres but very much larger than 8400 nanometres!
Is < Less than or Greater than or > Greater than or Less than
It is 8400 to the nearest hundred because 19 is less than 50
It is 8400 to the nearest hundred because 10 is less than 50
It is > for less than and < for greater than.
The greater than sign is ">" and the less than sign is "<"
they are the less than
< > = Greater than , less than and equal too
Is < Less than or Greater than or > Greater than or Less than
less than
Less than < Greater than >
Greater than: > Less than: <
greater than is > less than is <
It is 8400 to the nearest hundred because 19 is less than 50
greater than > less than < pointy end towards the smaller value
less
greater than= > less than= <
The "is greater than" and "is less than" symbols are the relations of an equality. this is the greater than symbol > this is the less than symbol <