The unit price of a story book is 28 yuan, and the unit price of a fairy tale book is more expensive than the story book (1/7). How much is the unit price of a fairy tale book?
一本故事书的单价是28元，一本童话书的单价比故事书贵(1/7)．一本童话书的单价是多少元？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 + (1/7)</gadget>
<output>8/7 = around 1.142857</output>

<gadget id="calculator">28 * (8/7)</gadget>
<output>32</output>

<result>32</result>