A part with a length of 3 meters, on a drawing with a scale of (1/200), what is its length in centimeters?
3米长的一个零件，在比例尺是(1/200)的图纸上，它的长应该是多少厘米．
<gadget id="calculator">3 * 100</gadget>
<output>300</output>

<gadget id="calculator">1 / 200</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">300 * (1/200)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>