The children's toy factory produces a batch of plush toys, and the task has been completed (4/9), leaving 250 unproduced. How many plush toys have been produced?
儿童玩具厂生产一批毛绒玩具，已经完成了任务的(4/9)，还剩250个没有生产．已经生产了毛绒玩具多少个？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 - (4/9)</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">250 / (5/9)</gadget>
<output>450</output>

<gadget id="calculator">450 - 250</gadget>
<output>200</output>

<result>200</result>