Xiao Ming rides a bicycle from home to school. It is known that he walks 310 meters per minute, and it takes 12 minutes to walk 210 meters away from the school. How far is his home from the school?
小明骑自行车从家到学校，已知他每分钟走310米，走12分钟，距学校还有210米，他家距学校多远？
<gadget id="calculator">310 * 12</gadget>
<output>3_720</output>

<gadget id="calculator">3_720 + 210</gadget>
<output>3_930</output>

<result>3_930</result>