Lele Department Store entrusts the moving station to deliver 100 vases. The two parties agreed on a shipping fee of 1 yuan for each piece, but if any damage occurs, not only will the shipping fee not be paid for each broken piece, but 1 yuan will be compensated. Question: How many vases were broken during the transportation?
乐乐百货商店委托搬运站运送100只花瓶．双方商定每只运费1元，但如果发生损坏，那么每打破一只不仅不给运费，而且还要赔偿1元，结果搬运站共得运费92元．问：搬运过程中共打破了几只花瓶？
<gadget id="calculator">1 * 100</gadget>
<output>100</output>

<gadget id="calculator">100 - 92</gadget>
<output>8</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<result>4</result>