There were 38 sparrows in total on the two trees, and half of them flew away from the first tree and landed on the second tree, and then 3 sparrows flew away from the second tree and landed on the first tree. There are 6 more sparrows on the tree than on the first tree. How many sparrows are there on the first tree? (link to key points of thinking method)
两棵树上共有麻雀38只，从第一棵树上飞走一半落到第二棵树上，又从第二棵树上飞走3只落到第一棵树上，这时第二棵树上比第一棵树上多6只，最初第一棵树上有多少只麻雀？(链接思想方法要点)
<gadget id="calculator">38 - 6</gadget>
<output>32</output>

<gadget id="calculator">32 / 2</gadget>
<output>16</output>

<gadget id="calculator">16 - 3</gadget>
<output>13</output>

<gadget id="calculator">13 * 2</gadget>
<output>26</output>

<result>26</result>