A number (5/6) is 45, what is 50% of this number.
一个数的(5/6)是45，这个数的50%是多少．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">45 / (5/6)</gadget>
<output>54</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">54 * (1/2)</gadget>
<output>27</output>

<result>27</result>