Lili learned 6 English words on the first day, and then learned 1 more word every day than the previous day, and learned 16 words on the last day. How many words did Lili learn during these days?
丽丽学英语单词，第一天学会了6个，以后每天都比前一天多学1个，最后一天学会了16个，丽丽在这些天中学会了多少个单词？
<gadget id="calculator">6 + 16</gadget>
<output>22</output>

<gadget id="calculator">16 - 6</gadget>
<output>10</output>

<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<gadget id="calculator">11 / 2</gadget>
<output>11/2 = around 5.5</output>

<gadget id="calculator">22 * (11/2)</gadget>
<output>121</output>

<result>121</result>