The fruit grower has 1,000 watermelons, some of which are broken during transportation, so when selling, the good part can make a profit of 40%, and the bad part can be sold at a reduced price with a loss of 30%, but in the end the fruit grower makes a total profit of 28.8%, then the transportation process How many are damaged.
果农有西瓜1000个，在运输过程中破裂了一部分，因此在出售时候，好的部分可以获利40%，坏的部分降价出售亏损了30%，但最终果农总共获利28.8%，那么运输过程中损坏了多少个．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1_000 * (2/5)</gadget>
<output>400</output>

<gadget id="calculator">28.8 / 100</gadget>
<output>0.288</output>

<gadget id="calculator">1_000 * 0.288</gadget>
<output>288</output>

<gadget id="calculator">400 - 1_000 - 288</gadget>
<output>-888</output>

<gadget id="calculator">1_000 + (-888)</gadget>
<output>112</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(2/5) - 1</gadget>
<output>-3/5 = around -0.6</output>

<gadget id="calculator">(3/10) + 1 + (-3/5)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">112 / (7/10)</gadget>
<output>160</output>

<result>160</result>