batch of goods is planned to be distributed to two transport teams of A and B according to 5:7. Team B actually transported 840 tons, completing 80% of the convoy's mission. Later, due to other tasks, Team A transported the rest. How many tons did Team A actually transport?
一批货物计划按5：7分配给甲乙两个运输队．实际乙队运了840吨，完成本车队任务的80%，后因另有任务调走，其余的全部由甲队运完，甲队实际运了多少吨．
<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(7/12) * (4/5)</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">840 / (7/15)</gadget>
<output>1_800</output>

<gadget id="calculator">1_800 - 840</gadget>
<output>960</output>

<result>960</result>