Draw the conformation that results when a chair-chair interconversion is done on each ring of the conformation of a cis-decalin derivative shown here.

Chair conformation of a cis-decalin derivative after chair-chair interconversion.

Another chair conformation of a cis-decalin derivative post interconversion.

Final chair conformation of a cis-decalin derivative after chair-chair interconversion.

Alternative chair conformation of a cis-decalin derivative with a methyl group.