Xiaohong's home is 312 meters away from the school. She has to go back and forth twice a day. How many meters does Xiaohong walk every day?
小红的家距离学校有312米，每天她要往返两次，请问小红每天要走多少米？
<gadget id="calculator">312 * 4</gadget>
<output>1_248</output>

<result>1_248</result>