(5/8) of a number is 4, what is (8/9) of this number.
一个数的(5/8)是4，这个数的(8/9)是多少．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">4 / (5/8)</gadget>
<output>32/5 = around 6.4</output>

<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">(32/5) * (8/9)</gadget>
<output>256/45 = around 5.688889</output>

<result>256/45 = around 5.688889</result>