The worker transported 2,000 pieces of glass. According to the regulations, the shipping fee for each piece of glass was 2 yuan. If one piece of glass was damaged, the shipping fee would not be paid, but the loss would be 10 yuan. After the shipment of these glasses, the worker earned a total of 3,400 yuan. How many pieces of glass did they break in total?
工人运输2000块玻璃，按规定每块玻璃运费2元，损坏一块不但不给运费，反而要赔偿损失10元，运完这批玻璃后，工人共赚了3400元．他们共损坏了多少块玻璃？
<gadget id="calculator">2 * 2_000</gadget>
<output>4_000</output>

<gadget id="calculator">4_000 - 3_400</gadget>
<output>600</output>

<gadget id="calculator">2 + 10</gadget>
<output>12</output>

<gadget id="calculator">600 / 12</gadget>
<output>50</output>

<result>50</result>