Uncle Wang planted trees on the edge of a square fish pond, 10 trees were planted equidistantly on each side, and trees were planted at the four corners. The distance between every two trees was 4 meters. How many meters is the perimeter of the fish pond?
王大爷在正方形鱼池边上植树，每边等距离植树10棵，四个角都植有树，每两棵树之间相距4米，鱼池的周长是多少米？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">4 * 9</gadget>
<output>36</output>

<gadget id="calculator">36 * 4</gadget>
<output>144</output>

<result>144</result>