A courier company consigns 300 boxes of glass for a customer. According to the contract, the shipping fee for each box is 120 yuan. If a box is damaged, the shipping fee will not be paid and 200 yuan will be compensated. After the delivery, the total shipping fee will be 15,200 yuan.
某快递公司为客户托运300箱玻璃，按合同规定每箱运费120元，若损坏一箱不给运费并赔偿200元，运到后结算时共得运费15200元，共损坏了多少箱？
<gadget id="calculator">120 * 300</gadget>
<output>36_000</output>

<gadget id="calculator">36_000 - 15_200</gadget>
<output>20_800</output>

<gadget id="calculator">120 + 200</gadget>
<output>320</output>

<gadget id="calculator">20_800 / 320</gadget>
<output>65</output>

<result>65</result>