There is a pile of logs piled up in a trapezoidal shape, with 3 logs on the top layer and 8 logs on the bottom layer, making a total of 6 layers. How many logs are there in this pile?
有一堆圆木堆成梯形，最上面一层3根，最下面一层8根，一共堆了6层，这堆圆木一共有多少根．
<gadget id="calculator">3 + 8</gadget>
<output>11</output>

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

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

<result>33</result>