Answer :
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
[tex] \\ \boxed{2(4x7)}} \\ [/tex]