[填空题]
A Pyrex measuring cup waqfy0c5w6 i6x/ nzrd 2ns cal;hw0 vukf)j:hk/ e 6xgibrated at normal room temperature. How much error will be m0vgx:fk;h/u)kwj e h6ade in a recipe calling for 300 mL of cool water, if the water and the cup are hot, at 80$^{\circ} $C, instead of at 20$^{\circ} $C? Neglect the glass expansion.$\approx$ ml