The speeds of A, B, and C are respectively that A walks 45 meters per minute, B walks 50 meters per minute, and C walks 70 meters per minute. A and B start from East Town at the same time, and C walks towards each other from West Town. C meets A 3 minutes after meeting B, find the distance between the two towns.
甲、乙、丙三人的速度分别为甲每分钟走45米，乙每分钟走50米，丙每分钟走70米，甲、乙从东镇、丙从西镇同时出发相向而行．丙遇到乙后3分钟遇到甲，求两镇间的距离．
<gadget id="calculator">45 + 70</gadget>
<output>115</output>

<gadget id="calculator">70 * 3</gadget>
<output>210</output>

<gadget id="calculator">50 * 3</gadget>
<output>150</output>

<gadget id="calculator">210 + 150</gadget>
<output>360</output>

<gadget id="calculator">50 - 45</gadget>
<output>5</output>

<gadget id="calculator">360 / 5</gadget>
<output>72</output>

<gadget id="calculator">115 * 72</gadget>
<output>8_280</output>

<result>8_280</result>