The school organizes students to visit the wildlife park. The bus departs from the school at 7:15 in the morning and returns immediately after arriving at the zoo. The time to arrive at the school is 11:15. The bus travels an average of 70 kilometers per hour on the road. How far is the school from the zoo? Far?
学校组织学生去参观野生动物园，大巴车上午7：15从学校出发，到动物园后立即返回，到学校的时间是11：15，大巴车在路上平均每小时行驶70千米，学校距离动物园有多远？
<gadget id="calculator">4 * 70</gadget>
<output>280</output>

<gadget id="calculator">280 / 2</gadget>
<output>140</output>

<result>140</result>