Tianhe Village carried out afforestation activities last year. In the first half of the year, 3/5 of the afforestation plan was completed, and in the second half of the year, 75% of the afforestation plan was completed. As a result, 630 more trees were planted. How many trees did the village actually planted last year?
天河村去年开展植树造林活动，上半年完成造林计划的(3/5)，下半年完成造林计划的75%，结果多造林630棵，这个村去年实际造林多少棵？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) - 1</gadget>
<output>-1/4 = around -0.25</output>

<gadget id="calculator">(3/5) + (-1/4)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">630 / (7/20)</gadget>
<output>1_800</output>

<gadget id="calculator">(3/5) + (3/4)</gadget>
<output>27/20 = around 1.35</output>

<gadget id="calculator">1_800 * (27/20)</gadget>
<output>2_430</output>

<result>2_430</result>