options(digits = 15)
HK80GEO_TO_WGS84GEO(22.323701767, 114.138734989)
### $latitude
### [1] 22.3221739892222
###
### $longitude
### [1] 114.141179433444
### Answer from the online conversion tool
### 22.322172084
### 114.141187917
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