I guess you mean surface area.
Let V1 and V2 be the volumes of the similar figures respectively.
Let A1 and A2 be the surface areas of the similar figures respectively.
V1V2=(scale factor)3=(length of a side of V1length of a side of V2)3
A1A2=(scale factor)2=(length of a side of V1length of a side of V2)2
∴(V1V2)2=(A1A2)3
.