Number A: Number B=(3/4), what is the ratio of number B to the sum of numbers A and B
甲数：乙数=(3/4)，乙数与甲、乙两数和的比是多少
<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<result>4/7 = around 0.571429</result>