The school playground was originally 100 meters long and 80 meters wide. After the expansion, the length and width each increased by 30 meters. Do the math: How many meters has the perimeter of the playground increased after the expansion?
学校操场原来长100米，宽80米，扩建后长和宽各增加了30米，算一算：扩建后操场的周长增加了多少米？
<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<result>120</result>