The convenience store entrusts a logistics company to transfer 1,000 vases, and agrees that the shipping fee for each vase is 0.8 yuan. However, if one is damaged, not only will the damaged one not be paid the shipping fee, but also a compensation of 9.20 yuan. As a result, the logistics company gets a shipping fee of 730 yuan. How many?
便民商店委托物流公司转运1000只花瓶，议定每只花瓶运费0.8元，但如果损毁一只，不但损毁的一只不给运费，还要赔偿9.20元，结果物流公司得到运费730元，问损坏花瓶多少只？
<gadget id="calculator">1_000 * 0.8</gadget>
<output>800</output>

<gadget id="calculator">800 - 730</gadget>
<output>70</output>

<gadget id="calculator">0.8 + 9.2</gadget>
<output>10</output>

<gadget id="calculator">70 / 10</gadget>
<output>7</output>

<result>7</result>