Xiaorui is going to buy some greeting cards with a sum of money, but because the price of greeting cards has increased by 20%, he bought 6 less cards. How many greeting cards can Xiaorui buy now?
小睿准备用一笔钱买一些贺卡，由于贺卡涨价20%，结果少买6张，小睿现在可买多少张贺卡？
<gadget id="calculator">36 - 6</gadget>
<output>30</output>

<result>30</result>