  We will prove a multidimensional conformal version of the scale recurrence
lemma of Moreira and Yoccoz \cite{MY} for Cantor sets in the complex plane. We
then use this new recurrence lemma, together with the ideas in \cite{M}, to
prove that under the right hypothesis for the Cantor sets $K_1,...,K_n$ and the
function $h:\mathbb{C}^{n}\to \mathbb{R}^{l}$, the following formula holds
\[HD(h(K_1\times K_2 \times ...\times K_n))=\min \{l,HD(K_1)+...+HD(K_n)\}.\]
