
from math import exp

# Define the constants
a = 1  # in nm
x = 1.5  # in nm
dx = 0.0001  # in nm

# Calculate |Psi|^2 * dx
result = (1 / a) * exp(-2 * abs(x) / a) * dx
result *= 1e6  # convert to 10^-6

print(result)
