In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Hero ( or Heron ) of Alexandria ( c . 10 – 70 CE ) was an ancient Greek mathematician and engineer .
Hero of Alexandria ( ; Greek : , " Heron ho Alexandreus " ; also known as Heron of Alexandria ; c . 10 AD – c . 70 AD ) was a mathematician and engineer who was active in his native city of Alexandria , Roman Egypt .