There are a pile of round steel pipes in the steel pipe yard, with 12 on the top floor and 22 on the bottom floor, one less for each floor from bottom to top. How many steel pipes are there in total?
钢管场有一堆圆形钢管，最上层有12根，最下层有22根，从下往上每层少一根．这堆钢管一共有多少根？
<gadget id="calculator">12 + 22</gadget>
<output>34</output>

<gadget id="calculator">22 - 12</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<gadget id="calculator">11 / 2</gadget>
<output>11/2 = around 5.5</output>

<gadget id="calculator">34 * (11/2)</gadget>
<output>187</output>

<result>187</result>