The distance between the two places measured on a map with a scale of 1:3500000 is 2 centimeters, how many kilometers are the actual distance?
在比例尺为1：3500000的图上量得两地的距离是2厘米，实际相距多少千米．
<gadget id="calculator">1 / 3_500_000</gadget>
<output>1/3_500_000 = around 0</output>

<gadget id="calculator">2 / (1/3_500_000) / 100_000</gadget>
<output>70</output>

<result>70</result>