How are they "roughly" "exactly" the same length? How is it possible to be exact and approximate simultaneously?

So here in Oklahoma the House and Senate passed ''Constitutional Carry" for us to be able to carry with out going through like Kansas and other states,which we we were very happy! So all Oklahoma needed was our Governor Marry Fallon ti sign it into law and guess what???? YUP SHE VETOED IT!! Im 45 yrs old and at no time in my life have I remembered such a time to where our Constitution has been under such an assault!!!!!