Liangliang went to the bookstore and saw a set of "Fairy Tales" priced as follows: 16 copies per set, 15.5 yuan each. Liangliang bought a set with a membership card, and only spent 218.7 yuan. How much money did it save using the loyalty card?
亮亮去书店，看到一套《童话故事》标价如下：每套16本，每本15.5元，亮亮用会员卡买了一套，只用了218.7元．它使用会员卡节省了多少钱？
<gadget id="calculator">16 * 15.5</gadget>
<output>248</output>

<gadget id="calculator">248 - 218.7</gadget>
<output>29.3</output>

<result>29.3</result>