Question 985426
Insufficient information. Seven congruent areas can be drawn in an infinite number of rectangles with area 336 units squared.
For example, a rectangle 1 unit x 336 units consists of seven congruent 1 unit by 48 unit rectangles, and a 7 unit by 48 unit also consists of seven congruent 1 unit by 48 unit rectangles, but the perimeter of the first is 674 units and the perimeter of the second is 110 units.
More information is needed to find a single solution.