The sixth grade students of Dongfeng Primary School planted 150 trees, which is 25% less than the fifth grade. How many trees are planted in the fifth grade?
东风小学六年级学生植树150棵，比五年级植树少25%，五年级植树多少棵？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">150 / (3/4)</gadget>
<output>200</output>

<result>200</result>