In a week, a steelmaking plant makes a total of 4,800 tons of steel in the first 3 days, and 7,800 tons of steel in the next 4 days. How many tons of steel are made per day on average this week?
一座炼钢厂在一星期里，前3天共炼钢0.48万吨，后4天共炼钢0.78万吨，这一星期平均每天炼钢多少万吨？
<gadget id="calculator">0.48 + 0.78</gadget>
<output>1.26</output>

<gadget id="calculator">1.26 / 7</gadget>
<output>0.18</output>

<result>0.18</result>