#include

using namespace std;

int main$()\{$

double G $=6\mathrm{.}673$e$-11$;

double M $=5\mathrm{.}98$e$24$;

double accelGravity;

double distCenter;

cin $>>$ distCenter;

$/*$ Your solution goes here $*/$

cout $<<$ accelGravity $<<$ endl;

return $0$;

$\}$