There are some paper cups, stack them together, if 30 paper cups are stacked together, the height is 26cm, if 100 paper cups are stacked together, the height is 61cm, how many cm is a paper cup high?
有一些纸杯，把它们叠放在一起，如果30个纸杯叠放在一起，高26cm，如果100个纸杯叠放在一起，高61cm，一个纸杯高多少cm？
<gadget id="calculator">61 - 26</gadget>
<output>35</output>

<gadget id="calculator">100 - 30</gadget>
<output>70</output>

<gadget id="calculator">35 / 70</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">100 * (1/2)</gadget>
<output>50</output>

<gadget id="calculator">61 - 50</gadget>
<output>11</output>

<gadget id="calculator">11 + (1/2)</gadget>
<output>23/2 = around 11.5</output>

<result>23/2 = around 11.5</result>