Soil-Water-Plant Relationship

During the reproductive peak stage of a maize crop, reference crop evapotranspiration is measured as $ET_0 = 6.0\text{ mm/day}$. The crop coefficient for maize at this stage is $K_c = 1.15$. The actual crop evapotranspiration ($ET_c = K_c \times ET_0$) in $\text{mm/day}$ is ________ (round off to 2 decimal places).