Chapter 18: Dimension Reduction Strike_3

Shells, explosions, as if no one had ever seen them before...

But the moment the shell hit the ground, it immediately split into hundreds of smaller bombs that leaped seven or eight meters high, spreading out like a blooming flower around the point of impact for a hundred meters in diameter, and then came the thunderous blasts. Centred at the point of impact, nearly everything within a two hundred and fifty-meter diameter was engulfed in the fiery explosion,

How large is an irregular circular area with a two hundred and fifty-meter diameter?