To celebrate Children's Day, Xinhua Bookstore buys 5 sets of children's encyclopedias and gets 1 set free. Each set is 48 yuan. Lin Hai buys 5 sets at a time. How much is each set cheaper?
新华书店为庆祝"六一"儿童节，买5套儿童百科送1套，每套48元，林海一次买5套，每套便宜多少钱？
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">48 * (5/6)</gadget>
<output>40</output>

<gadget id="calculator">48 - 40</gadget>
<output>8</output>

<result>8</result>