def coins_daily(hash_rate: float, network_hash_rate: float, block_found_time: float, block_reward: float) -> float:
    """
    Computes how many XMR coins you can mine a day. Formula:
    seconds_in_day = 86400
    hash_rate / (network_hash_rate / {[seconds_in_day / block_found_time] * block_reward})

    :param hash_rate: Float. CPU performance in hashes per second.
    :param network_hash_rate: Float. Worldwide performance in hashes per second.
    :param block_found_time: Float. Current time required to find a block.
    :param block_reward: Float. Current reward for finding a block.
    :return: Float. Amount of XMR you can mine per day.
    """
    return hash_rate / (network_hash_rate / ((86400 / block_found_time) * block_reward))