#include <iostream>

#include <stdio.h>

#include <math.h>

using namespace std;

double f(double x,double y)

{

return 6*pow(x,7)+8*pow(x,6)+7*pow(x,3)+5*pow(x,2)-y*x;

}

double func(double x, double y)

{

return 42*pow(x,6)+48*pow(x,5)+21*pow(x,2)+10*x-y;

}

int main()

{

int t;

double y,left,right,mid,ans1,ans2,ans3;

scanf("%d",&t);

while(t--)

{

scanf("%lf",&y);

if(func(0.0,y)>=0)

printf("%.4f\n",f(0.0,y));

else if(func(100.0,y)<=0)

printf("%.4f\n",f(100.0,y));

else

{

left = 0.0;

right = 100.0;

mid = 50.0;

ans1 = func(left,y);

ans2 = func(mid,y);

ans3 = func(right,y);

while(fabs(ans1-ans2)>0.0001)

{

if(ans2>0)

{

ans3 = ans2;

right = mid;

mid = (left+right)/2;

}else

{

ans1 = ans2;

left = mid;

mid = (left+right)/2;

}

ans2 = func(mid,y);

}

printf("%.4f\n",f(mid,y));

}

}

return 0;

}