The school playground is 40 meters long and 30 meters wide. Xiao Fang ran around the playground once. How many meters did he run?
学校操场长40米，宽30米，小方绕操场跑1圈，他跑了多少米？
<gadget id="calculator">40 + 30</gadget>
<output>70</output>

<gadget id="calculator">70 * 2</gadget>
<output>140</output>

<result>140</result>