The school has an experimental field of 800 square meters. 500 square meters are used to plant beans, 40% of the remaining part are planted cucumbers, and the rest are all planted tomatoes. What is the area for planting tomatoes?
学校有一块800平方米实验田，用500平方米种豆角，剩余部分的40%种黄瓜，其余的全部种西红柿，种西红柿的面积是多少？
<gadget id="calculator">800 - 500</gadget>
<output>300</output>

<gadget id="calculator">40 / 100</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">300 * (3/5)</gadget>
<output>180</output>

<result>180</result>