You will see a code for finding coordinates of your current position and we will use haversine formula to find the distance between two points in Earth
\[a = ({\sin {\frac{dlat}{2}}})^2 + \cos ({lat1}) * \cos ({lat2}) * ({\sin {\frac {dlon}{2}}})^2 \]
\[c = 2 * \arctan ({ \sqrt a, \sqrt {1-a}}) \]
\[d = R * c\]
dlon = lon2 - lon1;
dlat = lat2 - lat1;
a = (sin(dlat/2))^2 + cos(lat1) * cos(lat2) * (sin(dlon/2))^2;
c = 2 * atan2( sqrt(a), sqrt(1-a) );
distance = r * c;