The soap factory wants to produce a batch of soaps. It has already produced 653 pieces, and the task can be completed by producing 247 pieces. How many pieces of this batch of soaps are there?
香皂厂要生产一批香皂，已经生产了653块，再生产247块就能完成任务，这批香皂有多少块．
<gadget id="calculator">653 + 247</gadget>
<output>900</output>

<result>900</result>