The side length of a square is 50m. Starting from one corner, place a potted flower every 5m. It is required that there are flowers in all four corners. How many potted flowers are needed in total.
正方形边长是50m，从一个角开始，每隔5m放一盆花，要求四个角都有花，一共需要多少盆花．
<gadget id="calculator">50 / 5</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<gadget id="calculator">11 * 4</gadget>
<output>44</output>

<gadget id="calculator">44 - 4</gadget>
<output>40</output>

<result>40</result>