The length of the school's plastic runway is 300 meters a week. Xiao Ming ran 3 laps. How many meters did he run?
学校朔胶跑道一周的长是300米，小明跑了3圈，他跑了多少米．
<gadget id="calculator">300 * 3</gadget>
<output>900</output>

<result>900</result>