The students donated money to the people in the disaster area. Class 61 donated a total of 2,100 yuan, Class 62 donated from Class 61 (6/7), Class 64 donated (5/6), how much did Class 64 donate in total?
同学们为灾区人民捐款．六一班共捐款2100元，六二班的捐款是六一班捐款的(6/7)，是六四班捐款的(5/6)，六四班共捐款多少元？
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(6/7) / (5/6)</gadget>
<output>36/35 = around 1.028571</output>

<gadget id="calculator">2_100 * (36/35)</gadget>
<output>2_160</output>

<result>2_160</result>