You can't convert that. It just doesn't make sense to convert between square units and linear units.
1:4
Square units and cubic units are quite different things; it doesn't make sense to convert from one to the other.
It is: 13 times 9 = 117 square units
You can't convert between units of area and units of length.
Factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36. So, there are 5 rectangles with an area of 36 cm^2 is 5.
123x123=123
You can't convert that. It just doesn't make sense to convert between square units and linear units.
You can't convert that. It just doesn't make sense to convert between units of length and units of area.
1:4
Square units and cubic units are quite different things; it doesn't make sense to convert from one to the other.
What units are 15 and 16 in
You can't convert between linear units and units of area.
It is: 13 times 9 = 117 square units
You can't convert between units of area and units of length.
A decimetre is a unit of distance. A square metre is a unit of area. The two units are therefore incompatible.
There is an infinite number of answers. Let x = sqrt(24) and let 0 < B <= x units. There are an infinite number of values that B can take. Let L = 24/B units. Then a rectangle with sides L and B will have an area of 24 sq units.