The main bridge of Sutong Bridge is about 2100 meters long, how many centimeters should be drawn on the scale map of 1:100000.
苏通大桥主桥全长约2100米，在1：100000的比例尺图上应画多少厘米．
<gadget id="calculator">2_100 * 100</gadget>
<output>210_000</output>

<gadget id="calculator">1 / 100_000</gadget>
<output>1/100_000 = around 0.00001</output>

<gadget id="calculator">210_000 * (1/100_000)</gadget>
<output>21/10 = around 2.1</output>

<result>21/10 = around 2.1</result>