The length of a teaching building is 150 meters, how many centimeters should it draw on a 1:1000 paper.
一幢教学楼的长是150米，把它画在1：1000的纸上应画多少厘米．
<gadget id="calculator">150 * 100</gadget>
<output>15_000</output>

<gadget id="calculator">1 / 1_000</gadget>
<output>1/1_000 = around 0.001</output>

<gadget id="calculator">15_000 * (1/1_000)</gadget>
<output>15</output>

<result>15</result>