car travels 45 kilometers per hour from place A to place B. After 3 hours, it happens to travel the entire distance (5/7). Find the distance between places A and B.
一辆汽车从甲地开往乙地，每小时行45千米，3小时后恰好行了全程的(5/7)，求甲乙两地的路程．
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">3 / (5/7)</gadget>
<output>21/5 = around 4.2</output>

<gadget id="calculator">45 * (21/5)</gadget>
<output>189</output>

<result>189</result>