A piece of wire is 94 cm long. After making a square frame with a side length of 18 cm, how many cm is left?
一段铁丝长94厘米，做了一个边长18厘米的正方形框架后，还剩多少厘米？
<gadget id="calculator">18 * 4</gadget>
<output>72</output>

<gadget id="calculator">94 - 72</gadget>
<output>22</output>

<result>22</result>