解:依题意得方程,□×△=36 (1)□÷△=4 (2)(1)÷(2)得□×△÷(□÷△)=36÷4□×△÷□×△=9△×△=9△=±√9△=±3当△=3时,有□÷3=4,□=4×3=12当△=-3时,有□÷(-3)=4,□=4×(-3)=-12即□=12,△=3或□=-12,△=-3.