If you move 10,000 bottles, you can get a shipping fee of 30 yuan for every 100 bottles. If one is damaged, you will not be paid the shipping fee, but you will also be compensated 50 cents. Someone gets a total shipping fee of 2,600 yuan. How many bottles did he damage?
搬运10000只瓶子，每100只可得运费30元，如果损坏一只不但不给运费，还要赔5角，某人共得运费2600元，问他损坏了几只瓶子？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">30 * (1/10)</gadget>
<output>3</output>

<gadget id="calculator">10_000 * 3</gadget>
<output>30_000</output>

<gadget id="calculator">30_000 - 26_000</gadget>
<output>4_000</output>

<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">4_000 / 8</gadget>
<output>500</output>

<result>500</result>