250 boxes of glass bottles are consigned. The contract stipulates that the shipping fee for each box is 20 yuan. If one box is damaged, the compensation will be 100 yuan. At the final settlement, the shipping fee will be 4,400 yuan. How many boxes were broken?
托运玻璃瓶250箱，合同规定每箱运费20元，若打坏一箱要赔偿损失100元，最后结算时，共得运费4400元，问打坏了几箱？
<gadget id="calculator">20 * 250</gadget>
<output>5_000</output>

<gadget id="calculator">5_000 - 4_400</gadget>
<output>600</output>

<gadget id="calculator">100 + 20</gadget>
<output>120</output>

<gadget id="calculator">600 / 120</gadget>
<output>5</output>

<result>5</result>