The transportation company carries 100 vases, and the contract stipulates that the shipping fee will be 5 yuan for the complete one to the destination, and 25 yuan for the damaged one. After transporting these vases, the transportation company received a total of 440 yuan in freight according to the contract. How many vases did the shipping company damage?
运输公司承运100个花瓶，合同规定完整运一个到目的地给运费5元，损坏一个倒赔25元．运完这批花瓶后，运输公司按合同规定共得运费440元．运输公司损坏了几个花瓶？
<gadget id="calculator">5 * 100</gadget>
<output>500</output>

<gadget id="calculator">500 - 440</gadget>
<output>60</output>

<gadget id="calculator">25 + 5</gadget>
<output>30</output>

<gadget id="calculator">60 / 30</gadget>
<output>2</output>

<result>2</result>