Ruijin Forest Farm planted 1,600 trees last year, exceeding the plan (1/7). The tree planting on March 12 this year was more than last year's plan (5/7). How many trees does this tree farm plan to plant this year?
瑞金林场去年植树1600棵，超过了计划的(1/7)，今年3月12日植树又比去年计划植树多(5/7)．这个林场今年计划植树多少棵？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 + (1/7)</gadget>
<output>8/7 = around 1.142857</output>

<gadget id="calculator">1_600 / (8/7)</gadget>
<output>1_400</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">1 + (5/7)</gadget>
<output>12/7 = around 1.714286</output>

<gadget id="calculator">1_400 * (12/7)</gadget>
<output>2_400</output>

<result>2_400</result>