Xiaoming walks (17/3) kilometers per hour, Xiaoying walks (17/4) kilometers per hour, and the two start from the same place in the opposite direction. After (12/7) hours, how many kilometers are there between them?
小明每小时走(17/3)公里，小英每小时走(17/4)公里，两人从同一地点反向出发，(12/7)小时后，两人相距多少公里？
<gadget id="calculator">17 / 3</gadget>
<output>17/3 = around 5.666667</output>

<gadget id="calculator">17 / 4</gadget>
<output>17/4 = around 4.25</output>

<gadget id="calculator">(17/3) + (17/4)</gadget>
<output>119/12 = around 9.916667</output>

<gadget id="calculator">12 / 7</gadget>
<output>12/7 = around 1.714286</output>

<gadget id="calculator">(119/12) * (12/7)</gadget>
<output>17</output>

<result>17</result>