A passenger car travels from A to B, the ratio of the distance it has traveled to the distance it has not traveled is 3:4, and it has traveled 45 kilometers. How many kilometers are there between A and B?
一辆客车从甲地到乙地，已行的路程和未行的路程比是3：4，已行了45千米．甲乙两地相距多少千米？
<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">45 / (3/7)</gadget>
<output>105</output>

<result>105</result>