The denominator of a simplest fraction is reduced to the original (1/3), and the numerator is expanded by 3 times to be equal to 7 (1/2). What is the simplest fraction.
把一个最简分数的分母缩小到原来的(1/3)，分子扩大原来的3倍后等于7(1/2)．这个最简分数是多少．
<gadget id="calculator">15 / 3</gadget>
<output>5</output>

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

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>