When the salesperson counted the money, he found that the cash was 28 yuan and 80 cents more. She recalled that the decimal point of a sum of money was wrong. Do you know that she misremembered the amount?
营业员在清点钱数时，发现现金多了28元8角．她回忆是一笔钱的小数点点错了一位，你知道她是把多少钱记错了吗？
<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">28 + (4/5)</gadget>
<output>144/5 = around 28.8</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">(144/5) / 9</gadget>
<output>16/5 = around 3.2</output>

<result>16/5 = around 3.2</result>