from random import randint

def esperance_jeu(nb_sim, mise):
    gain_total = 0
    for _ in range(nb_sim):
        gain = -mise
        x = randint(1, 6)
        gain += 2 * x
        y = randint(1, 5)
        gain += 1 if y <= 4 else 7
        gain_total += gain
    gain_moyen = gain_total / nb_sim
    return gain_moyen

print(esperance_jeu(10**5, 8))