#LOOP 2 FUNGSI MENGGUNAKAN FUNGSI TRAPESIUM
Nz = 6
Nx = 10
dx = 0.1
dz = 0.1
n = int ((Nx - 0)/dx) #ba nx, bb 0
n1 = int ((Nz - 0)/dz) #ba nz, bb 0
x0 = 0
V = 0
for i in range (int(n1)):
    A=0
    for k in range (int(n)):
        x1 = x0 + (k) * dx
        y1 = x1          # y1 = f(x)
        x2 = x0 + (k+1) * dx
        y2 = x2          # y2=f(x2)
        dA = (y1+y2) * dx /2
        A = A + dA


    dV = A * dz
    V = V + dV

print(V)