Make a fish tank with a length of 8 decimeters, a width of 40 centimeters, and a height of 6 decimeters. If you want to put an apron around the fish tank, how long is the apron?
制作一个长8分米，宽40厘米，高6分米的鱼缸，如果要在鱼缸四周围上一圈胶圈，需要多长的胶圈？
<gadget id="calculator">8 * 40</gadget>
<output>320</output>

<gadget id="calculator">40 * 6</gadget>
<output>240</output>

<gadget id="calculator">320 + 240</gadget>
<output>560</output>

<gadget id="calculator">560 * 2</gadget>
<output>1_120</output>

<result>1_120</result>