Three wooden strips with a length of 10 cm are nailed into a long wooden strip. The overlapping part of every two wooden strips is 3 cm long. How many centimeters is this long wooden strip?
将3根长10厘米的木条钉成一根长木条，每两根木条的重叠部分长3厘米，这根长木条长多少厘米？
<gadget id="calculator">10 * 3</gadget>
<output>30</output>

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

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">30 - 6</gadget>
<output>24</output>

<result>24</result>