There are a total of 13 matches, how many triangles and how many squares can be assembled, and how many matches can be used up?
一共有13根火柴，一共可以拼成几个三边形和几个正方形，并且刚好使这些火柴都用完？
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

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

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<result>3</result>