A pile of the same logs has 8 logs in the bottom row, 1 log less in each row up, and 3 logs in the top row, how many logs are there in total in this pile.
一堆同样的圆木，最下一排是8根，往上每排依次少1根，最上面一排是3根，这堆圆木共有多少根．
<gadget id="calculator">3 + 8</gadget>
<output>11</output>

<gadget id="calculator">8 - 3</gadget>
<output>5</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">11 * 3</gadget>
<output>33</output>

<result>33</result>