Yang Dan is 3,400 meters from home to school, and draw it on the drawing with a scale of 1:100,000. How long should it be?
杨丹从家到学校3400米，用1：100000的比例尺把它画在图纸上，应画多长？
<gadget id="calculator">1 / 100_000</gadget>
<output>1/100_000 = around 0.00001</output>

<gadget id="calculator">3_400 * 100 * (1/100_000)</gadget>
<output>17/5 = around 3.4</output>

<result>17/5 = around 3.4</result>