import numpy as np

def calculate_dot_product(vec1, vec2):
    """
    Calculate the dot product of two vectors.
    Args:
        vec1 (numpy.ndarray): 1D array representing the first vector.
        vec2 (numpy.ndarray): 1D array representing the second vector.
    Returns:
        float: Dot product of the two vectors.
    """
    dot = np.dot(vec1,vec2)
    return dot

if __name__ == "__main__":
    vec1 = np.array(eval(input()))
    vec2 = np.array(eval(input()))
    print(calculate_dot_product(vec1, vec2))