Verified Answer :

Kytten

The product of four and seven is written as 4 x 7. When you double something, you times it by two. So, double this value would be two times the quantity of four times seven, which is written as 2(4 x 7)

Double means 2. The product of 4 and 7 is 4*7, so the expression would be

\(\\ \boxed{2(4x7)}} \\\)