The school playground is 50 meters long and 35 meters wide. How many meters is it for Huanhuan to run around the playground?
学校操场长50米，宽35米，欢欢沿操场跑一圈是多少米．
<gadget id="calculator">50 + 35</gadget>
<output>85</output>

<gadget id="calculator">85 * 2</gadget>
<output>170</output>

<result>170</result>