Xiaoming has to walk 780 meters from home to school, which is 70 meters longer than Xiaoqing's distance from home to school. How far is it from Xiaoming's home to school and then to Xiaoqing's home?
小明从家到学校要走780米，比小青从家到学校的距离多70米，请问从小明家到学校再到小青家有多远？
<gadget id="calculator">780 - 70</gadget>
<output>710</output>

<gadget id="calculator">710 + 780</gadget>
<output>1_490</output>

<result>1_490</result>