Solid oxalic acid exists as a dihydrate:(COOH)2*2H2O

Solid oxalic acid exists as a dihydrate:(COOH)2*2H2O.

How many grams of the acid-hydrate was required to make 800.0 ml of a 0.51 M standard oxalic acid solution? (HINT: use 126.07 g/mol as the molecular mass of oxalic acid dihydrate.)

*Report your answer using the correct number of significant digits.