Xiao Ming went to buy a notebook. He first bought 5 notebooks. Later, he found that there was a 40% discount in the mall for more than 6 notebooks.
小明去买笔记本，先买了5本，后来发现了6本以上商场打6折，小明又买了8本，结果发现比买5本还省了1元钱，小明一共花了多少元钱．
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">8 * (3/5)</gadget>
<output>24/5 = around 4.8</output>

<gadget id="calculator">5 - (24/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / (1/5)</gadget>
<output>5</output>

<gadget id="calculator">5 * 5 * 2</gadget>
<output>50</output>

<gadget id="calculator">50 - 1</gadget>
<output>49</output>

<result>49</result>