The answer is true! I hope this helped you
The Enlightenment, also known as the Age of Reason, was a philosophical movement that took place primarily in Europe and, later, in North America, during the late 17th and early 18th century. Its participants thought they were illuminating human intellect and culture after the "dark" Middle Ages.
That's what i found on Google when i copied and pasted your statement.
2 multiplied by 10
OR
10 plus 10
Which give us the answer as 20
Therefore 2 pens cost Dhs20
Hope it helps :)