The distance between A and B is 15 kilometers. The Austrian zebra and Koizumi set off from A and B respectively at the same time and walk towards each other. When they arrive at the starting point of the other party, they immediately return along the original road. 80 meters, Koizumi walks 70 meters per minute. So, how far away is the place where they met for the third time from City B?
甲、乙两城相距15千米，奥斑马和小泉分别从甲、乙两城同时出发，相向而行，当他们到达对方的出发地后，立即沿原路返回，已知奥斑马每分钟走80米，小泉每分钟走70米．那么，他们第三次相遇的地方距离乙城多少米？
<gadget id="calculator">15 * 1_000 * 3</gadget>
<output>45_000</output>

<gadget id="calculator">80 + 70</gadget>
<output>150</output>

<gadget id="calculator">5 / 150</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">80 * 15 * 1_000 * (1/30)</gadget>
<output>40_000</output>

<gadget id="calculator">45_000 - 40_000</gadget>
<output>5_000</output>

<result>5_000</result>