[填空题]
A Pyrex measuring cup was calibrated at normal room; qxpbm+o:jn)c .6xdp jb 9/ ,oeyv7gygy-j.2 wf(gjj temperature. How much error will be madfg-gwo,.jyj 7ejj(2gyy 9b/ ve 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