The school wants to plant 500 trees, and divide the tree planting task between the fifth and sixth grades at a ratio of 2:3. In the actual tree planting, the sixth grade exceeds the original assigned task (2/5), how many trees are actually planted in the sixth grade?
学校要植树500棵，把植树任务按2：3分给五、六两个年级．实际植树时，六年级超过原分配任务的(2/5)，六年级实际植树多少棵？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

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

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">500 * (3/5) * (7/5)</gadget>
<output>420</output>

<result>420</result>