#include <iostream>
#include <fstream>

using namespace std;

float w,h,m,d,b;
float A,moatA,baseA;
float baseL;
float ch, r,cilA;
int main()
{
ifstream infile;
infile.open("castles.in");
int rounds,i=1,j=0;
infile>>rounds;

while(i<=rounds)
{
	cout<<"Data Set "<<i<<":"<<endl;
	baseL = 0;
infile>>w>>h>>m>>d>>b;
A = w*h;
moatA = 2*m*w + 2*m*h -4*m*m;
baseL = baseL + (moatA * d) / A;

j = 0;
while(j < b)
{
	infile>>ch>>r;
	cilA = 3.1415926535897932384626433832795 * r * r * ch;
	//cout<<cilA<<endl;
	baseL = baseL - (cilA)/A;
j++;
}
printf("%.2f\n",baseL);
i++;
}

return 0;
}