The podium is 3 meters long and 70 cm wide. What is the perimeter of the podium in centimeters?
讲台长3米，宽70厘米，这个讲台面的周长是多少厘米？
<gadget id="calculator">3 * 100</gadget>
<output>300</output>

<gadget id="calculator">300 + 70</gadget>
<output>370</output>

<gadget id="calculator">370 * 2</gadget>
<output>740</output>

<result>740</result>