On New Year’s Day, the lilies in the flower shop are 12 yuan a piece. Now buy 5 pieces and get one free. If you buy 5 pieces at a time, how much is each piece cheaper?
元旦节，花店的百合花12元一枝，现在买5支送一枝，一次买5枝，每枝便宜多少元？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">12 * (5/6)</gadget>
<output>10</output>

<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<result>2</result>