A and B jointly complete 700 parts, and after 5 days of cooperation, there are still 50 parts left unprocessed. A processes 70 pieces per day, how many pieces does B process per day?
甲、乙二人共同完成700个零件，合作5天后还剩下50个没有加工．甲每天加工70个，乙每天加工多少个？
<gadget id="calculator">70 * 5</gadget>
<output>350</output>

<gadget id="calculator">700 - 50 - 350</gadget>
<output>300</output>

<gadget id="calculator">300 / 5</gadget>
<output>60</output>

<result>60</result>