Knowing that the Sun loses 10 ^ 36 particles / s in the form of the solar wind, and assuming that the wind speed is constant

Knowing that the Sun loses 10 ^ 36 particles / s in the form of the solar wind, and assuming that the wind speed is constant and equal to 400 km / s, estimate the density of the solar wind in the region of the orbit of Venus. Express your answer in kg / m3

1.4 * 10 ^ -20 kg / m3 (we consider the substance of the solar wind to be fully ionized, therefore about half of the particles in it are electrons and about half are protons).