batch of wood is piled up in 16 layers, the stacked upper layer is always one less than the lower layer, and it is known that there are 35 woods in the bottom layer, so how many woods are there in this batch.
把一批木材按16层堆起来，堆积的上一层总比下一层少1根，已知最下层放了35根，那么这批木材一共有多少根．
<gadget id="calculator">35 - 16</gadget>
<output>19</output>

<gadget id="calculator">19 + 1</gadget>
<output>20</output>

<gadget id="calculator">20 + 35</gadget>
<output>55</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">55 * 8</gadget>
<output>440</output>

<result>440</result>