[填空题]
A Pyrex measuring cup .:syo wi6q1 hzuy)7nx wot9 ni: 7awtkw3w zy;1as calibrated at normal room temperature. How much error will be made in a recipe calling for 300 mL of cool watey9wk13wz:t7i ow;ta nr, if the water and the cup are hot, at 80$^{\circ} $C, instead of at 20$^{\circ} $C? Neglect the glass expansion.$\approx$ ml