Uncle Wang bought several tons of apples at the wholesale market at a price of 2.4 yuan per kilogram. He hired a truck to transport the apples to a store 400 kilometers away at a cost of 1.5 yuan per ton per kilometer. If 10% of the apples are damaged after arriving at the store, what is the price per kilogram of apples, and 20% of the cost can be earned?
王大伯到批发市场进了若干吨苹果，进价每千克2.4元．他雇用了卡车，把苹果运往400千米处的商店，运费每吨每千米需1.5元．到商店后损坏了10%的苹果，每千克苹果的定价是多少元时可赚成本的20%？
<gadget id="calculator">1 * 1_000 * 2.4</gadget>
<output>2_400</output>

<gadget id="calculator">400 * 1.5</gadget>
<output>600</output>

<gadget id="calculator">2_400 + 600</gadget>
<output>3_000</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 * 1_000 * (9/10)</gadget>
<output>900</output>

<gadget id="calculator">(6/5) / 900</gadget>
<output>1/750 = around 0.001333</output>

<gadget id="calculator">3_000 * (1/750)</gadget>
<output>4</output>

<result>4</result>