A store sells a drink for 36 yuan per box. If you buy 5 boxes, you can get 1 box free. Now Uncle Li buys 5 boxes at a time. How much is each box cheaper?
某商店一种饮料卖36元/箱，如果买5箱可以送1箱，现在李叔叔一次性买5箱，每箱便宜多少钱？
<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">36 * (5/6)</gadget>
<output>30</output>

<gadget id="calculator">36 - 30</gadget>
<output>6</output>

<result>6</result>