The fishing vessel "Taihe" fished 840 tons in October, 20% more than in September. How many tons are caught in September?
"太和号"捕鱼船十月份捕鱼840吨，比九月份多捕鱼20%．九月份捕鱼多少吨？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">840 / (6/5)</gadget>
<output>700</output>

<result>700</result>