Team A and Team B have to process 1560 parts within 6 hours. It is known that team A processes 120 parts per hour, how many parts does B process per hour? (equation solution)
甲乙两个小组要在6小时内加工1560个零件．已知甲小组每小时加工120个零件，乙每小时加工零件多少个？(方程解)
<gadget id="calculator">120 * 6</gadget>
<output>720</output>

<gadget id="calculator">1_560 - 720</gadget>
<output>840</output>

<gadget id="calculator">840 / 6</gadget>
<output>140</output>

<result>140</result>