A rectangular flowerbed is 32 meters long and 18 meters wide, and a potted flower is placed every 4 meters around it. How many potted flowers should be placed in total?
一个长方形花圃的长32米，宽是18米，在它的四周每隔4米放一盆花，一共要放多少盆花？
<gadget id="calculator">32 + 18</gadget>
<output>50</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">50 * (1/2)</gadget>
<output>25</output>

<result>25</result>