Shenzhen Lianhua Primary School, in the activity of "Giving Love - Donating to Poor Areas", the five classes of the sixth grade donated a total of 6,300 yuan, of which the first class donated 1,400 yuan, the second class donated 100 yuan less than the first class, and the third class donated 100 yuan less than the first class. 20% of the total, the ratio of donations from Class 3 to Class 4 is (6/7). How much do you want to donate to class four?
深圳莲花小学在"献爱心--为贫困地区捐款"活动中，六年级五个班共捐款6300元，其中一班捐款1400元，二班比一班少捐款100元，三班捐款数是年级总数的20%，三班与四班捐款数之比是(6/7)．求四班捐款多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">6_300 * (1/5)</gadget>
<output>1_260</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">1_260 / (6/7)</gadget>
<output>1_470</output>

<result>1_470</result>