When a large number of peaches were on the market, the daily price was 80% of the previous day. My mother bought 2 kilograms on the first day, 3 kilograms on the second day, and 5 kilograms on the third day. The total cost was 38 yuan. These peaches are all bought on the third day, how much less can I spend?
水蜜桃大量上市的时候，每天的价格都是前一天的80%，妈妈第一天买了2千克，第二天买了3千克，第三天买了5千克，共花了38元，如果这些水蜜桃都在第三天买，能少花多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3 * (4/5)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">5 * (4/5) * (4/5)</gadget>
<output>16/5 = around 3.2</output>

<gadget id="calculator">2 + (12/5) + (16/5)</gadget>
<output>38/5 = around 7.6</output>

<gadget id="calculator">38 / (38/5)</gadget>
<output>5</output>

<gadget id="calculator">2 + 3 + 5</gadget>
<output>10</output>

<gadget id="calculator">5 * (4/5) * (4/5) * 10</gadget>
<output>32</output>

<gadget id="calculator">38 - 32</gadget>
<output>6</output>

<result>6</result>