It takes about 6 meters of cloth to make a curtain. Now there are 228 meters of cloth. After making some curtains, there are 18 meters of cloth left. How many curtains have been made?
做一幅窗帘大约用6米布．现在有228米布，做了一些窗帘后，还剩18米布，已经做好了多少幅窗帘？
<gadget id="calculator">228 - 18</gadget>
<output>210</output>

<gadget id="calculator">210 / 6</gadget>
<output>35</output>

<result>35</result>