zoj1037

#include<stdio.h>
#include<math.h>
int main()
{
float num;
int n;
int width,length;
int count=0;
scanf("%d",&n);
while(n)
{
scanf("%d%d",&length,&width);
if((width*length)%2)
{
num=width*length*1.0-1.0+sqrt(2);
}
else
{
num=width*length*1.0;
}
count++;
n--;
printf("Scenario #%d:\n",count);
printf("%.2f\n\n",num);

}
return 0;
}