Xiaoli folded 7 origami cranes, and the number of origami cranes that Xiaohong folded was 3 times that of Xiaoli, 2 less. How many origami cranes did Xiaohong fold?
小丽折了7只纸鹤，小红折的纸鹤是小丽的3倍少2只，小红折了多少只纸鹤？
<gadget id="calculator">7 * 3</gadget>
<output>21</output>

<gadget id="calculator">21 - 2</gadget>
<output>19</output>

<result>19</result>