Bingbing read a story book in 4 days (3/7), how much does he read this book every day?
兵兵4天看了一本故事书的(3/7)，他每天看这本书的多少．
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(3/7) / 4</gadget>
<output>3/28 = around 0.107143</output>

<result>3/28 = around 0.107143</result>