There is the same product, the purchase price of the fat boss is lower than that of the thin boss (1/10), the price of the fat boss can get 20% profit, the price of the thin boss can get 15% profit, the price of the thin boss is higher than that of the fat boss The price is 11.2 yuan, what is the purchase price of the fat boss?
有同样一款商品，胖老板的进价比瘦老板低(1/10)，胖老板的定价能获取20%的利润，瘦老板的定价能获取15%的利润，瘦老板的定价比胖老板的贵11.2元，胖老板的进价是多少？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">1 * (23/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">1 / 10</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">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">(9/10) * (6/5)</gadget>
<output>27/25 = around 1.08</output>

<gadget id="calculator">(23/20) - (27/25)</gadget>
<output>7/100 = around 0.07</output>

<gadget id="calculator">11.2 / (7/100)</gadget>
<output>160</output>

<gadget id="calculator">160 * (9/10)</gadget>
<output>144</output>

<result>144</result>