A number is 4.5 more than 50 (9/25). Find this number?
一个数比50的(9/25)多4.5，求这个数？
<gadget id="calculator">9 / 25</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">50 * (9/25)</gadget>
<output>18</output>

<gadget id="calculator">18 + 4.5</gadget>
<output>22.5</output>

<result>22.5</result>