Run a series of simulations with the number of darts equal different powers of ten $(10,100,1000,10000,$ etc.$)$ and observe how the error changes with the number of darts. Based on your observation, how big an increase in the number of darts thrown are required to reduce the error in

by a factor of $10($e$.$g$.$ to reduce the error from $0\mathrm{.}04$ to $0\mathrm{.}004)?$