Xiaoguang started collecting used batteries on February 25, 2012. He collected 5 batteries per day on average. By March 3, how many used batteries had he collected in total?
小光从2012年2月25日开始收集废旧电池，他平均每天收集5个，到3月3日止，他一共收集多少个废旧电池？
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<result>40</result>