Xiaohong's home is 300 meters away from the school. One morning, Xiaohong went to school, walked the whole way (2/5), and suddenly remembered that she didn't take the math book, so he went home to get the book before going to school. How many meters did Xiaohong walk to school in the morning?
小红家距学校有300米．一天早上小红去上学，走了全程的(2/5)，突然想起数学书没有拿，他返回家拿上书后再去上学．小红早上上学一共走了多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5) + (2/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">300 * (9/5)</gadget>
<output>540</output>

<result>540</result>