(9/7) of a number is (1/2), what is this number.
一个数的(9/7)是(1/2)，这个数是多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">9 / 7</gadget>
<output>9/7 = around 1.285714</output>

<gadget id="calculator">(1/2) / (9/7)</gadget>
<output>7/18 = around 0.388889</output>

<result>7/18 = around 0.388889</result>