The porter moves 1,000 pieces of porcelain, and it is stipulated that the shipping fee for moving one piece is 0.30 yuan. If one piece is broken, not only will the shipping fee not be paid, but also a compensation of 0.50 yuan. The final moving fee for the porter is 260 yuan. Ask the porter how much he broke. Porcelain?
搬运工搬运1000件瓷器，规定搬运1件可得运费0.30元，打碎1件不但得不到运费，还要赔偿0.50元，最后搬运工的搬运费是260元，问搬运工打碎了几件瓷器？
<gadget id="calculator">1_000 * 0.3</gadget>
<output>300</output>

<gadget id="calculator">300 - 260</gadget>
<output>40</output>

<gadget id="calculator">0.3 + 0.5</gadget>
<output>0.8</output>

<gadget id="calculator">40 / 0.8</gadget>
<output>50</output>

<result>50</result>