If the speed of light is the new unit of speed and year the new unit of time, then what will be new unit of length ? What is the name of the unit ? Given $C=3\times {10}^8 \mathrm{m}/\mathrm{s}$ and $1 \mathrm{year}=3.154\times {10}^7 \mathrm{s}$

A new unit of length is so chosen that the speed of light in vacuum is unity. What is the distance between the Sun and the Earth in terms of the new unit if light takes $8$minutes and $20$ seconds to cover the distance ?