A school accepts the task of planting trees. If 1,200 trees are planted every day, the planting can be completed one day earlier than planned; if 800 trees are planted per day, the planting will be completed one day later than planned. The plan stipulates how many trees to plant every day.
某学校接受植树任务，如果每天植树1200棵，可以比计划提前一天植完；如果每天植树800棵，将比计划拖后一天植完．计划规定每天植树多少棵．
<gadget id="calculator">1_200 - 800</gadget>
<output>400</output>

<gadget id="calculator">2 / 400</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">1_200 * (1/200)</gadget>
<output>6</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">800 * (6/5)</gadget>
<output>960</output>

<result>960</result>