Wang Yuchen walked 3 times around a rectangular playground with a length of 45m and a width of 25m. How many m did she walk?
王雨辰围着一长45m宽25m长方形操场走了3圈，她走了多少m．
<gadget id="calculator">45 + 25</gadget>
<output>70</output>

<gadget id="calculator">70 * 2 * 3</gadget>
<output>420</output>

<result>420</result>