Trouble is, I was taught slightly different values for the SI prefixes and back when I went to school, tera was a billion kilos. So if it still functions that way, we’re talking hundreds of billions instead. Our national budget for the year is 20 billion. But if every person with a job paid just a million extra euros in tax, we could afford to do it!

Not sure if you were taught wrong or misremembering, but giga is the standard notation for billion, and tera is trillion. Kilo, mega, giga, tera, quad, quin, peta, exa.... They go on much farther than that, but at that point, just use exponential notation.

E: wrong notation form