Supernova Shelton 1987A, located about 170 000 ly from the Earth, is estimated to have emitted a burst of neutrinos carrying energy ~1046 J. Suppose the average neutrino energy was 6 MeV and your body presented cross-sectional area 5 000 cm^2. To an order of magnitude, how many of these neutrinos passed through you? My first step was to convert both energies to J, once this was done I was able to find out how many neutrinos were present in the original burst. My issue is at this point, how to connect the amount of neutrinos originally to how many would pass through a body with cross sectional area 5 000cm^2. Thanks for the help.