(2/3) of a number is 270, what is 45% of this number?
一个数的(2/3)是270，这个数的45%是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">270 / (2/3)</gadget>
<output>405</output>

<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">405 * (9/20)</gadget>
<output>729/4 = around 182.25</output>

<result>729/4 = around 182.25</result>