During a peak growth month, the reference crop evapotranspiration $ET_0 = 6.0\text{ mm/day}$ and the crop coefficient $K_c = 1.15$. Effective rainfall during the month is $25\text{ mm}$. If the month has $30\text{ days}$, the net irrigation requirement ($NIR$) of the crop for the month in millimeters is ________ (answer in integer).