Expand the numerator of the fraction (3/4) to 2 times the original, and shrink the denominator to 2 times the original, how many times the fraction will be expanded to the original
把分数(3/4)的分子扩大至原来的2倍，分母缩小至原来的2倍，这个分数就扩大至原来的多少倍
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

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

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

<result>4</result>