A classroom is 12 meters long and 9 meters wide. If it is drawn on a plan with a scale of 1:300, what is the length in centimeters?
一间教室长12米，宽9米，画在比例尺是1：300的平面图上，长应该画多少厘米．
<gadget id="calculator">12 * 100</gadget>
<output>1_200</output>

<gadget id="calculator">1 / 300</gadget>
<output>1/300 = around 0.003333</output>

<gadget id="calculator">1_200 * (1/300)</gadget>
<output>4</output>

<result>4</result>