import sys
import io, os
input = io.BytesIO(os.read(0,os.fstat(0).st_size)).readline

from fractions import Fraction

def calc(x,y):
    y[0]-=x[0]
    y[1]-=x[1]
    y[2]-=x[2]
    
    return [x[0]-x[2]*y[0]*Fraction(1,y[2]),x[1]-x[2]*y[1]*Fraction(1,y[2])]

def calc2(x,y,z):
    y[0]-=x[0]
    y[1]-=x[1]
    z[0]-=x[0]
    z[1]-=x[1]

    return abs(y[1]*z[0]-y[0]*z[1])

mod=998244353
INV=pow(2,mod-2,mod)

T=int(input())
LANS=[]

for tests in range(T):
    A=list(map(int,input().split()))
    B=list(map(int,input().split()))
    C=list(map(int,input().split()))
    L=list(map(int,input().split()))

    P=calc(L,A)
    Q=calc(L,B)
    R=calc(L,C)

    ANS=calc2(P,Q,R)

    ANS1=ANS.numerator
    ANS2=ANS.denominator

    LANS.append(ANS1*pow(ANS2,mod-2,mod)%mod*INV%mod)

print("\n".join(map(str,LANS)))