There are 6 ○s in the first row, 16 ○s in the second row, how many ○s are given from the second row to the first row, and the number of the two rows is the same? Answer: How many ○ for the first row?
第一排有6个○，第二排有16个○，第二排拿出几个给第一排，两排的个数就同样多？答：给第一排多少个○．
<gadget id="calculator">16 + 6</gadget>
<output>22</output>

<gadget id="calculator">22 / 2</gadget>
<output>11</output>

<gadget id="calculator">16 - 11</gadget>
<output>5</output>

<result>5</result>