The students went to participate in the tree planting activity. A total of 300 people went to the fourth, fifth, and sixth grades. How many people in grades participate in tree planting activities?
同学们去参加植树活动，四、五、六年级一共去了300人，五年级去的人数是总人数的(1/4)，五年级人数是六年级人数的(3/5)，求六年级有多少人参加植树活动？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(1/4) / (3/5)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">300 * (5/12)</gadget>
<output>125</output>

<result>125</result>