In a pile of steel pipes, there are 12 steel pipes in the top layer and 23 steel pipes in the bottom layer. From top to bottom, there is one more steel pipe in each layer. How many steel pipes are there in such a pile?
一堆钢管，最上层12根，最下层23根，从上到下每层多1根，这样的一堆钢管一共有多少根？
<gadget id="calculator">12 + 23</gadget>
<output>35</output>

<gadget id="calculator">23 - 12</gadget>
<output>11</output>

<gadget id="calculator">11 + 1</gadget>
<output>12</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">35 * 6</gadget>
<output>210</output>

<result>210</result>