Install colored lanterns around a square square, one on each of the four corners, and 25 on each side. How many colored lanterns should be installed in this square?
在正方形的广场四周装彩灯，四个角上都装一盏，每边装25盏，问这个广场一共需装彩灯多少盏？
<gadget id="calculator">25 * 4</gadget>
<output>100</output>

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

<result>96</result>