Schwarzschild radius:

$\overline{){{\mathbf{R}}}_{{\mathbf{s}}}{\mathbf{=}}\frac{\mathbf{2}\mathbf{G}\mathbf{M}}{{\mathbf{c}}^{\mathbf{2}}}}$

Estimate the Schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (Assume that your weight is 50 kg)

Express your answer using one significant figure.

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