The perimeter of a square flowerbed is 160m. If one side of it is increased by 10m and the other side is increased by 20m, how much is the area increased?
一个正方形花圃的周长是160m，如果把它的一边增加10m，另一边增加20m，那么面积增加了多少？
<gadget id="calculator">160 / 4</gadget>
<output>40</output>

<gadget id="calculator">40 + 20</gadget>
<output>60</output>

<gadget id="calculator">40 + 10</gadget>
<output>50</output>

<gadget id="calculator">60 * 50</gadget>
<output>3_000</output>

<gadget id="calculator">40 * 40</gadget>
<output>1_600</output>

<gadget id="calculator">3_000 - 1_600</gadget>
<output>1_400</output>

<result>1_400</result>