car has driven 30% of the journey from place A to place B, and it is still 140 kilometers away from place B. How many kilometers has the car traveled?
一辆汽车从甲地开往乙地，已行驶了全程的30%，离乙地还有140千米．这辆汽车行驶了多少千米？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">140 / (7/10)</gadget>
<output>200</output>

<result>200</result>