Xiaobing and Xiaogang set off at the same time from the school to the provincial library. Xiaobing rides a bicycle at 230 meters per minute, and Xiaogang walks at 70 meters per minute. Xiaobing rode his bicycle to the provincial library and found that he forgot to bring his library card, so he immediately returned to school and met Xiaogang 720 meters away from the provincial library. What is the distance in meters from the school to the provincial library?
小兵、小刚两人同时出发由学校去省图书馆．小兵骑自行车每分钟行230米，小刚步行每分钟行70米．小兵骑自行车到省图书馆后发现忘记带借书证，于是立即返回学校，在离省图书馆720米处与小刚相遇．学校到省图书馆之间的距离是多少米．
<gadget id="calculator">230 - 70</gadget>
<output>160</output>

<gadget id="calculator">2 / 160</gadget>
<output>1/80 = around 0.0125</output>

<gadget id="calculator">720 * (1/80) * 70</gadget>
<output>630</output>

<gadget id="calculator">630 + 720</gadget>
<output>1_350</output>

<result>1_350</result>