Observe the following group of numbers: (2/3), (4/5), (6/7), (8/9), (10/11), ..., they are arranged according to certain rules, then this group What is the 20th digit of the number?
观察下列一组数：(2/3)，(4/5)，(6/7)，(8/9)，(10/11)，…，它们是按一定规律排列的，那么这一组数的第20个数是多少．
<gadget id="calculator">2 * 20</gadget>
<output>40</output>

<gadget id="calculator">40 + 1</gadget>
<output>41</output>

<gadget id="calculator">40 / 41</gadget>
<output>40/41 = around 0.97561</output>

<result>40/41 = around 0.97561</result>