For moving 1000 glass bottles, the shipping fee is stipulated to be 3 cents each, but if one is broken, a compensation of 2.2 yuan is required. Lao Zhang received a total of 175 yuan for shipping after the transportation, so how many glass bottles did he break during the transportation?
搬运1000只玻璃瓶，规定每只运费3角，但如打碎一只，须赔2.2元．老张搬运完后共得运费175元，则他在搬运中打碎了多少只玻璃瓶．
<gadget id="calculator">1_000 * 0.3</gadget>
<output>300</output>

<gadget id="calculator">300 - 175</gadget>
<output>125</output>

<gadget id="calculator">0.3 + 2.2</gadget>
<output>2.5</output>

<gadget id="calculator">125 / 2.5</gadget>
<output>50</output>

<result>50</result>