The students donated to the Hope Primary School in the Wenchuan disaster area. The first class of the fifth grade donated 980 yuan, and the second class of the fifth grade donated as much as the first class of the fifth grade (6/7).
同学们向汶川灾区的希望小学捐款，五年级一班捐款980元，五年级二班捐款数是五年级一班的(6/7)，五年级二班捐款多少元？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">980 * (6/7)</gadget>
<output>840</output>

<result>840</result>