On a map with a scale of 1:3500000, the distance from Fuzhou to Xiamen is measured to be 8cm. A car drives from Xiamen to Fuzhou at 70km per hour. How long does it take to arrive?
在一张比例尺是1：3500000的地图上，量得福州到厦门的距离是8cm，一辆汽车从厦门开往福州，每小时行驶70km，几小时到达？
<gadget id="calculator">1 / 3_500_000</gadget>
<output>1/3_500_000 = around 0</output>

<gadget id="calculator">8 / (1/3_500_000) / 100_000 / 70</gadget>
<output>4</output>

<result>4</result>