A cuboid swimming pool with a length of 100 meters, a width of 30 meters and a depth of 2 meters is surrounded by a circle of stainless steel guardrails 1 meter away from the swimming pool. How long is this fence?
一个长100米，宽30米，深2米的长方体游泳池，在游泳池四周外1米处围了一圈不锈钢护栏．这圈护栏长多少米？
<gadget id="calculator">100 + 1 + 1 + 30 + 1 + 1</gadget>
<output>134</output>

<gadget id="calculator">134 * 2</gadget>
<output>268</output>

<result>268</result>