A piece of wire is 85 cm long. After making a square frame with a side length of 15 cm, how many cm is left?
一段铁丝长85厘米，做了一个边长是15厘米的正方形框子后，还剩多少厘米？
<gadget id="calculator">15 * 4</gadget>
<output>60</output>

<gadget id="calculator">85 - 60</gadget>
<output>25</output>

<result>25</result>