Last year, a certain scenic area received 64,000 tourists during the "May 1st" small holiday. This year, the number of tourists received is 20% less than last year. How many tourists does this scenic area receive this year?
去年"五．一"小长假某风景区接待游客6.4万人，今年比去年接待的人数少20%，今年这个风景区接待游客多少人？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">6.4 * (4/5)</gadget>
<output>5.12</output>

<result>5.12</result>