A corridor is 56m long, and a pot of chrysanthemums is placed every 4m on both sides of it (the two ends are not placed). How many pots of chrysanthemums are there in total?
一条走廊长56m，在它的两边每隔4m摆放一盆菊花(两端不放)．一共要放多少盆菊花？
<gadget id="calculator">56 / 4</gadget>
<output>14</output>

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

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

<result>26</result>