The garment factory received an order to produce a batch of suits, producing an average of 50 suits per day, and 258 suits remained unfinished after 6 days. How many suits are there in total?
服装厂接到生产一批西服的订单，平均每天生产50套，6天后还剩258套没有完成．这批西服一共有多少套？
<gadget id="calculator">50 * 6</gadget>
<output>300</output>

<gadget id="calculator">300 + 258</gadget>
<output>558</output>

<result>558</result>