large number of honeydew melons are on the market. The price of these few days is 80% of the previous day. Xiaoming’s mother bought 2 on the first day, 3 on the second day, and 5 on the third day. The total cost was 38 yuan. , if these 10 honeydew melons are all bought on the third day, how much money can be saved?
某种蜜瓜大量上市，这几天的价格每天都是前一天的80%，小明的妈妈第一天买2个，第二天买3个，第三天买5个，共花了38元，如果这10个蜜瓜都在第三天买，那么能少花多少钱？
<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>