(4/9) of a number is 120, what is (1/2) of this number.
一个数的(4/9)是120，这个数的(1/2)是多少．
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">120 / (4/9)</gadget>
<output>270</output>

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

<gadget id="calculator">270 * (1/2)</gadget>
<output>135</output>

<result>135</result>