Xiangyang Street planted 1,800 pine trees last spring, 20% more than the original plan. How many pine trees did you plan to plant?
向阳街道去年春季种松树1800棵，比原计划多种20%．原计划种松树多少棵．
<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">1_800 / (6/5)</gadget>
<output>1_500</output>

<result>1_500</result>