(5/8) of a number is 0.85, what is (1/2) of this number.
一个数的(5/8)是0.85，这个数的(1/2)是多少．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">0.85 / (5/8)</gadget>
<output>1.36</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1.36 * (1/2)</gadget>
<output>0.68</output>

<result>0.68</result>