source: three-letter source currency code
target: three-letter target currency code
full_precision: whether to provide the full precision; defaults to false
triangulation_precision: number of digits (at least 3) to be rounded to after conversion of the source currency to euro; defaults to no rounding
EUROCONVERT converts n units of currency source to currency target. The rates used are the official ones used on the introduction of the Euro.
If full_precision is true, the result is not rounded; if it false the result is rounded to 0 or 2 decimals depending on the target currency; defaults to false. source and target must be one of the currencies listed for the EURO function. This function is not likely to be useful anymore.