A square with a side length of 4 cm is made with a piece of iron wire and there is 3 cm left. What is the length of the wire in cm?
用一根铁丝做了一个边长4厘米的正方形后还剩3厘米，这根铁丝长多少厘米．
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">20 + 3</gadget>
<output>23</output>

<result>23</result>