Zhang Ming's home is 550 meters away from the school, and he has to walk two times to and from school every day. How many meters does Zhang Ming walk to and from school every day?
张明家离学校550米，他每天上下学都要走2个来回，张明每天上下学共走了多少米？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">550 * 4</gadget>
<output>2_200</output>

<result>2_200</result>