Adding the same integer to the numerator and denominator of the fraction (3/8) at the same time results in a new fraction (3/4). What is the added integer?
在分数(3/8)的分子和分母上，同时加上一个相同的整数得到的新分数是(3/4)，所加的这个整数是多少？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) * 8</gadget>
<output>6</output>

<gadget id="calculator">6 - 3</gadget>
<output>3</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / (1/4)</gadget>
<output>12</output>

<result>12</result>