User blog comment:Alemas2005/Yet more Minecraft Screenshots/@comment-5084796-20130826150310/@comment-18933973-20130827165755

Not to mention, I didn't just use 24,000 gunpowder. I made the fireworks so that they shot to level three, which requires 3 gunpowder at the base. So, basically, multiply 24,000 by 3 and that's how much gunpowder I had to use.