Let’s say a Grade 4 Sorceror can give a CE output of 10. Gojo’s CE output should be like 1,000,000 in that case. A million squared (not even to the power of 2.5) would be a trillion. If a regular punch from Gojo is building level, a BF punch from Gojo would be a million times building level. That might not be continent level but I’m pretty sure that scales above the Tsar Bomba. And that’s only if we assume a Grade 4 Sorceror would have a CE output of only 10. Just goes to show how crazy Black Flashes would scale up with strength
Edit: just looked it up and 1,000,000^2.5 is a quadrillion. So Gojo Black Flashes would be a billion times stronger than his regular punches