In order to enrich the activities of the Happy Recess, the school purchased 300 skipping ropes, and distributed 2/5 of the total to the fourth graders, and the remaining skipping ropes were distributed to the fifth and sixth grades at a ratio of 3:2. How many skipping ropes do sixth graders get?
为丰富快乐大课间活动，学校购买了300根跳绳，将总数的2/5分给四年级同学，剩下的跳绳按3：2分给五、六两个年级．六年级同学分到多少根跳绳？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">300 * (3/5) * (2/5)</gadget>
<output>72</output>

<result>72</result>