The school's rectangular playground is 80 meters long and 50 meters wide. How many meters does it take for a student to run around the playground?
学校长方形操场长是80米，宽是50米，学生沿着操场跑一圈是多少米？
<gadget id="calculator">80 + 50</gadget>
<output>130</output>

<gadget id="calculator">130 * 2</gadget>
<output>260</output>

<result>260</result>