t = int(input())

for tt in range(t):
    a = list(map(int, input().split()))
    ans = 10**18
    for i, j, k in [(0, 2, 1), (1, 2, 0) ,(1, 0, 2), (2, 0, 1)]:
        tmp1 = max(a[j] - a[i] + 1, 0)
        aj = a[j] - tmp1
        tmp2 = max(a[k] - aj + 1, 0)
        ak = a[k] - tmp2
        if ak > 0:
            ans = min(ans, tmp1 * a[j + 3] + tmp2 * a[k + 3])
    if ans == 10**18:
        print(-1)
    else:
        print(ans)