Plant a row of trees along the perimeter of a square fish pond, plant one tree at each of the four corners, plant a total of 52 saplings, how many trees are planted on each side.
沿一个正方形鱼塘的四周栽树一行，四个角上都栽一棵，共种树苗52棵，每边栽树多少棵．
<gadget id="calculator">52 / 4</gadget>
<output>13</output>

<gadget id="calculator">13 + 1</gadget>
<output>14</output>

<result>14</result>