Final answer:
To match the power output of Sgr A*, billions of stars similar to our Sun would need to be collected due to the mass and power of the supermassive black hole being significantly greater than that of a single sun-like star.
Step-by-step explanation:
The supermassive black hole at the center of the Milky Way, known as Sagittarius A* (or Sgr A*), has an incredible mass approximately 4 million times that of our Sun (Msun). To match the power output of Sgr A*, we would need an astronomical number of sun-like stars clustered together. Given that a typical star like our Sun emits far less energy compared to the immensely powerful Sgr A*, the required number to equate Sgr A*'s output would be extraordinarily high, potentially in the scale of billions or more depending on the precise power output of Sgr A*. Considering that Alpha Centauri A, a star similar to the Sun, appears about 73 billion times fainter from Earth because of its distance, it indicates the sheer magnitude of difference in power output between a star like our Sun and a supermassive black hole.