The fifth grade donates 1,400 yuan to Hope Primary School, which is 2/7 less than the sixth grade. How much is the sixth grade donation?
五年级向希望小学捐款1400元，比六年级少捐(2/7)，六年级捐款多少元？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">1_400 / (5/7)</gadget>
<output>1_960</output>

<result>1_960</result>