A car travels 70 kilometers per hour. After driving for 4.5 hours, the ratio of the distance traveled to the distance not traveled is 3:7. How many kilometers is the total length of this road?
一辆汽车每小时行70千米，行了4.5小时后，已行的路程和未行的路程比是3：7，这段路全长多少千米？
<gadget id="calculator">3 + 7</gadget>
<output>10</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">4.5 / (3/10)</gadget>
<output>15</output>

<gadget id="calculator">70 * 15</gadget>
<output>1_050</output>

<result>1_050</result>