A rectangular western dining table is 150 cm long and 70 cm wide. What is the circumference of this western dining table in centimeters?
一个长方形的西餐桌，长150厘米，宽70厘米．这个西餐桌的周长是多少厘米？
<gadget id="calculator">150 + 70</gadget>
<output>220</output>

<gadget id="calculator">220 * 2</gadget>
<output>440</output>

<result>440</result>