Примеры предложений на английский со словом "back-of-the-envelope"

Doing some quick back-of-the-envelope calculations, he reckoned that the raw materials actually cost less than one-thirtieth of the selling price.
Перевести с английский на испанский

We can do some back-of-the-envelope calculations before all the facts come in.
Перевести с английский на испанский