There are some glass balls in a cloth bag, take one for the first time, and two for the second time... In this way, each time you take one more than the previous time, after taking it 8 times, there are still 2 glass balls left. How many glass balls are there in total?
一个布袋里装了一些玻璃球，第一次拿一个、第二次拿二个…这样每一次都比前一次多拿一个，拿了8次以后，还剩下2个玻璃球，这个布袋里一共装了多少个玻璃球？
<gadget id="calculator">1 + 8</gadget>
<output>9</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">9 * 4</gadget>
<output>36</output>

<gadget id="calculator">36 + 2</gadget>
<output>38</output>

<result>38</result>