The students participated in tree planting, and actually planted 150 trees, 25% more than planned. How many more trees were planted?
同学们参加植树，实际植树150棵，比计划多植了25%，多植了多少棵？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">150 / (5/4)</gadget>
<output>120</output>

<gadget id="calculator">150 - 120</gadget>
<output>30</output>

<result>30</result>