Moving 1,000 glass bottles, it is stipulated that moving one can get a handling fee of 3 cents, but breaking one can only pay 5 cents. If the total shipping cost is 260 yuan after the transportation, how many glass bottles were broken during the transportation?
搬运1000只玻璃瓶，规定搬一只可得搬运费3角，但打碎一只要赔5角．如果运完以后共得到运费260元，问搬运中打碎了多少只玻璃瓶？
<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>