The 48 students in the May 1st class collected tree species, and each person collected an average of 0.2 kilograms. According to this calculation, the 45 students in the Fifth Class 2 collected tree species, how many kilograms less than the May 1st class?
五一班48名学生采集树种，每人平均采集0.2千克，照这样计算，五二班45名学生采集树种，比五一班少采集多少千克？
<gadget id="calculator">48 * 0.2</gadget>
<output>9.6</output>

<gadget id="calculator">45 * 0.2</gadget>
<output>9</output>

<gadget id="calculator">9.6 - 9</gadget>
<output>0.6</output>

<result>0.6</result>