Xinfeng Village originally planned to dig a 12.5-kilometer canal in 25 days, but now it needs to dig an additional 7.5 kilometers, and it will also be completed in 25 days. How many kilometers will be dug on average every day?
新风村原计划25天挖一条12.5千米的水渠，现在要多挖7.5千米，同样要在25天完成，这样平均每天要多挖多少千米？
<gadget id="calculator">7.5 / 25</gadget>
<output>0.3</output>

<result>0.3</result>