176.625 to the nearest THOUSAND is '0'
However, I think you mean to the nearrest 'THOUSANDTH'. Note the '---th' suffix , which applies to decimal digits.
It is already at the nearest thousandth at '5'.
Here are the column names for the given numbers.
'1' ; Hundred
'7' ; Ten
'6' ; Unit
Decimal point
'6' ; TenTH
'2' ; HundredTH
'5' ; ThousandTH.
NB The suffix '---th(s)' is used for decimal digits.
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