gTTS does not sound right

Question

I am using the Python library gTTS (Google text to speech), and I am trying to synthesize the following:

"The area of Russia is 17,130,000 square kilometers."

Here is my code:

from gtts import gTTS
tts = gTTS(text="The area of Russia is 17,130,000 square kilometers.", lang="en-us")
print(f"Text: {tts.text}\nLanguage: {tts.lang}\nCreating audio...")
print(f"Saving audio...")
tts.save("sqkmrussia.mp3")
print("Done!")

I was expecting a Google Assistant voice, but look what I got: http://files.atharvnadkarni.com/sqkmrussia.mp3. That did not sound like Google Assistant.

I want a Google Assistant Voice for now.