A true fraction is equal to 1 after adding 1 to the numerator, and equal to (3/4) after adding 1 to the denominator. What is the true fraction?
一个真分数分子加1后等于1，分母加1后等于(3/4)，这个真分数是多少．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>