Nail 3 wooden strips each 8 meters long to form a long wooden strip. The overlapping part of every two wooden strips is 2 meters. How long is the long wooden strip nailed?
将3根每根长8米的木条钉成一根长木条，每两根木条的重叠部分是2米，这根钉成的长木条长多少米？
<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

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

<gadget id="calculator">24 - 4</gadget>
<output>20</output>

<result>20</result>