The Swiss teacher Balmer obtained the Balmer formula from the measured spectrum data (9/5), (16/12), (25/21), (36/32), please write the seventh data, how much is this data.
瑞士的教师巴尔末从测量光谱的数据(9/5)，(16/12)，(25/21)，(36/32)中得到了巴尔末公式，请你按这种规律写出第七个数据，这个数据为多少．
<gadget id="calculator">7 + 2</gadget>
<output>9</output>

<gadget id="calculator">9 ** 2</gadget>
<output>81</output>

<gadget id="calculator">81 - 4</gadget>
<output>77</output>

<gadget id="calculator">81 / 77</gadget>
<output>81/77 = around 1.051948</output>

<result>81/77 = around 1.051948</result>