Extraordinary New Armament

After calculating the acceleration due to gravity, the Earth's equatorial circumference, and even Planck's constant, Zhang Wei looks at the little girl making ice cream with magic and scratches his head. "So... where exactly does this magic come from?"

When a fallen queen summons a military enthusiast, the world of Zem is destined for turmoil.

P.S. Another-world military nation-building!