The department store entrusts the logistics company to deliver 1,000 glass vases. The two parties agree that the shipping fee for each glass vase is 1 yuan and 5 cents; The logistics company finally got a total of 1456 yuan in freight. How many vases were broken during the transportation?
百货公司委托物流公司运送1000只玻璃花瓶，双方商定每只的运费是1元5角；如果打破一只，这一只不但不计运费，并且要赔偿9元5角．物流公司最后共得运费1456元．搬运过程中共打破了多少只花瓶？
<gadget id="calculator">1.5 * 1_000</gadget>
<output>1_500</output>

<gadget id="calculator">1_500 - 1_456</gadget>
<output>44</output>

<gadget id="calculator">1.5 + 9.5</gadget>
<output>11</output>

<gadget id="calculator">44 / 11</gadget>
<output>4</output>

<result>4</result>