square flower bed was placed in front of the school building. There are 10 potted flowers on each side of the outermost layer of this flower bed, so how many potted flowers are placed on the outermost layer of this flower bed.
学校大楼前摆放了一个方阵花坛．这个花坛的最外层每边各摆了10盆花，那么这个花坛最外层共摆了多少盆花．
<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<gadget id="calculator">40 - 4</gadget>
<output>36</output>

<result>36</result>