A fiber channel switch element and method for routing fiber channel frames is provided. The multiplication method includes transforming a redundant-form multiplier by adding a recoding constant to the multiplier, performing recoding by using the transformed multiplier, and performing partial multiplication between the multiplier and a multiplicand using result values of the recoding. The back of the patch has a weak adhesive which is gentle to the skin. The shank is formed from a thermally non-transmissive material.