Add, subtract, and divide a fraction with itself, and then add the sum, difference, and quotient to get 8. What is the fraction?
用一个分数与它本身相加、相减、相除，然后把所得的和、差、商相加得8，这个分数是多少．
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<result>7/2 = around 3.5</result>