m_str = input('Input m: ')  # do not change this line
# change m_str to a float
m_float = float(m_str)
# remember you need c
c_str = 300000000
c_float = float(c_str)
#c_int = c_int ** 2
# e = 
e = (m_float * c_float **2)
print("e =", e)  # do not change this line
