Glue 20 paper strips of the same size into a paper strip with a length of 543 cm. If each joint overlaps by 3 cm, what is the length of each paper strip in centimeters?
将20张同样大小的纸条粘成一条长543厘米的纸条，如果每个接头处都重叠3厘米，那么每张纸条长多少厘米
<gadget id="calculator">19 * 3</gadget>
<output>57</output>

<gadget id="calculator">57 + 543</gadget>
<output>600</output>

<gadget id="calculator">600 / 20</gadget>
<output>30</output>

<result>30</result>