There is a small ant crawling forward at a speed of 1 cm per second at point A on a rubber band with sufficient elasticity. Counting from the time when the little ant starts to crawl, the rubber band will evenly elongate twice its original length at the 2nd, 4th, 6th, 8th, and 10th seconds. Then, at 9 seconds, how many centimeters is this little ant from point A?
有一个小蚂蚁在一根弹性充分好的橡皮筋上的A点，以每秒1厘米的速度向前爬行．从小蚂蚁开始爬行的时候算起，橡皮筋在第2秒、第4秒、第6秒、第8秒、第10秒…时均匀的伸长为原来的2倍．那么，在第9秒时，这只小蚂蚁离A点多少厘米．
<gadget id="calculator">60 + 1</gadget>
<output>61</output>

<result>61</result>