The experimental primary school plans to green a 300 square meter open space, first set aside (1/5) of the total area to plant trees, and plant flowers and grass in the ratio of 2:3 for the rest. Could you please calculate how big the area of the grass is?
实验小学计划绿化一块300平方米的空地，先划出总面积的(1/5)种树，剩余的按2：3种花和草．请你计算一下草的面积有多大？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">300 * (4/5) * (3/5)</gadget>
<output>144</output>

<result>144</result>