Ester Mixture

Mix $HCOOH$ and $CH_3COOH$ in an 1 mole : 1 mole ratio. Let $5.3$ grams of the mixture react with $5.75$ grams of $C_2H_5OH$ and use concentrated (dense) $H_2SO_4$ as the catalysis. After the reaction, we gain $m$ grams of an ester mixture.

Assume the efficiency of all esterifying chemical reactions above is always 80%.

Round $m$ to 2 decimal places. Type $m$ .