During Arbor Day, the sixth graders planned to plant 240 trees. In fact, it was planted in the first week (2/5), and how many more trees should be planted, so that the ratio of the number of plants that have been planted to those that have not been planted is 2:1.
植树节时，六年级同学计划植240棵树．实际第一周就植了(2/5)，还要再植多少棵，就使得已植的棵数与未植的比是2：1．
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">240 * (2/3)</gadget>
<output>160</output>

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

<gadget id="calculator">240 * (2/5)</gadget>
<output>96</output>

<gadget id="calculator">160 - 96</gadget>
<output>64</output>

<result>64</result>