There are a pile of steel pipes, there are 8 steel pipes in the bottom layer, 3 steel pipes in the top layer, and the difference between two adjacent layers is 1 steel pipe. What is the total number of steel pipes in this pile?
有一堆钢管，最下层有8根，最上层有3根，每相邻的两层都相差1根．这堆钢管的总根数是多少根．
<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>