For transporting 1,000 glass bottles, it is stipulated that one can be safely transported to get a handling fee of 30 cents. But if you break one, not only will you not pay the handling fee, but you will also pay 5 cents. If you finish shipping, you will get a total of 260 yuan for shipping. So, how many were broken during transportation?
搬运1000只玻璃瓶，规定安全运到一只可得搬运费3角．但打碎一只，不仅不给搬运费，还要赔5角，如果运完后共得运费260元．那么，搬运途中打碎了多少只？
<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>