A glass of juice has been drunk (5/9), and there is still 200ml left. How many milliliters is this glass of juice?
一杯果汁已经喝了(5/9)，还剩下200毫升．这杯果汁共有多少毫升？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">1 - (5/9)</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">200 / (4/9)</gadget>
<output>450</output>

<result>450</result>