There are 13 iron pipes in the top layer and 20 in the bottom layer. There are 8 layers in total. How many iron pipes are there in this pile?
有一堆铁管，最上层是13根，最下层是20根，一共堆了8层，这堆铁管共有多少根？
<gadget id="calculator">13 + 20</gadget>
<output>33</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">33 * 4</gadget>
<output>132</output>

<result>132</result>