Two people, A and B, completed a batch of parts together in 5 hours, and A made 225 parts when the task was completed. It is known that the work efficiency of B is faster than that of A (2/9). How many parts are there in total?
甲乙二人5小时共同完成一批零件，完成任务时甲做了225个．已知乙的工效比甲快(2/9)．这批零件一共多少个？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 + (2/9)</gadget>
<output>11/9 = around 1.222222</output>

<gadget id="calculator">225 * (11/9)</gadget>
<output>275</output>

<gadget id="calculator">225 + 275</gadget>
<output>500</output>

<result>500</result>