The speeds of cars A, B, and C are 100 km/h, 80 km/h, and 70 km/h, respectively. A and B are both at A, and C is at B. The three vehicles start at the same time. A, B and C go towards each other. C meets A 12 minutes later, then meets B. Find the distance between A and B.
甲、乙、丙三车的速度分别为100千米/小时、80千米/小时、70千米/小时．甲、乙同在A地，丙在B地，三车同时出发，甲、乙与丙相向而行，丙遇到甲12分钟后又遇到乙，求A、B两地之间的距离．
<gadget id="calculator">80 + 70</gadget>
<output>150</output>

<gadget id="calculator">12 / 60</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">70 * (1/5)</gadget>
<output>14</output>

<gadget id="calculator">80 * (1/5)</gadget>
<output>16</output>

<gadget id="calculator">14 + 16</gadget>
<output>30</output>

<gadget id="calculator">100 - 80</gadget>
<output>20</output>

<gadget id="calculator">30 / 20</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">150 * (3/2)</gadget>
<output>225</output>

<result>225</result>