Install colored lights around the square flat roof of the building, one at each corner, 25 lights on each side, how many colored lights are installed around it?
在大楼的正方形平顶四周装彩灯，四个角都装一盏，每边装25盏，四周共装彩灯多少盏？
<gadget id="calculator">25 * 4</gadget>
<output>100</output>

<gadget id="calculator">100 - 4</gadget>
<output>96</output>

<result>96</result>