If 50% of a number is 6 less than 45 (2/9), what is the number?
一个数的50%比45的(2/9)少6，则这个数是多少．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">45 * (2/9)</gadget>
<output>10</output>

<gadget id="calculator">10 - 6</gadget>
<output>4</output>

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

<gadget id="calculator">4 / (1/2)</gadget>
<output>8</output>

<result>8</result>