The fifth grade students planted 1200 trees, the sixth grade planted more trees than the fifth grade (2/5), how many trees did the sixth grade students plant?
五年级学生栽树1200棵，六年级比五年级多栽(2/5)，六年级学生栽树多少棵？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">1_200 * (7/5)</gadget>
<output>1_680</output>

<result>1_680</result>