The handling station transported 4,000 porcelain bowls for Carrefour Supermarket, and the shipping fee for each bowl was 0.45 yuan. If each bowl was damaged, not only would they not get the shipping fee, but they would also have to pay 2.05 yuan in compensation. At the final checkout, Carrefour paid a total of 1,750 yuan for shipping. How many bowls were damaged during the transportation?
搬运站为家乐福超市运送4000个瓷碗，每个瓷碗运费0.45元，如果每破损1个碗，不仅得不到运费，还要赔偿2.05元．最后结账时，家乐福超市共付运费1750元，搬运途中破损了几个碗？
<gadget id="calculator">4_000 * 0.45</gadget>
<output>1_800</output>

<gadget id="calculator">1_800 - 1_750</gadget>
<output>50</output>

<gadget id="calculator">0.45 + 2.05</gadget>
<output>2.5</output>

<gadget id="calculator">50 / 2.5</gadget>
<output>20</output>

<result>20</result>