The area of a square is 128 square centimeters, how many times to cut half of it every time, the area of the small square obtained is 1 square centimeter.
一张正方形的面积是128平方厘米，每1次剪下它的一半，要剪多少次，得到的小正方形面积是1平方厘米．
<result>7</result>