A factory originally used 8,000 kWh of electricity per day, but actually saved 5,000 kWh of electricity per day. The original 30-day electricity can be used for a few more days now?
某工厂原来每天用电0.8万度，实际每天节约用电0.05万度．原来30天用的电，现在可以多用几天？
<gadget id="calculator">0.8 - 0.05</gadget>
<output>0.75</output>

<gadget id="calculator">30 / 0.75</gadget>
<output>40</output>

<gadget id="calculator">0.8 * 40</gadget>
<output>32</output>

<gadget id="calculator">32 - 30</gadget>
<output>2</output>

<result>2</result>