In an experiment studying superheavy elements, a Seaborgium nucleus (106263Sg^{263}_{106}\text{Sg}106263Sg) is synthesized. This nucleus contains 106 protons and 157 neutrons.
Assuming that the average radius of a single nucleon r0 r_0\,r0 is 1.25 fm1.25\text{ fm}1.25 fm, calculate the radius of this Seaborgium nucleus. Give your answer in femtometres (fm\text{fm}fm) to an appropriate number of significant figures.