In a week, a certain transportation company transported 1977 tons of goods per day on average in the first 3 days, and 1970 tons of goods per day in the last 4 days. How many tons of goods are shipped on average per day this week.
某运输公司在一个星期里，前3天平均每天运货物1977吨，后4天平均每天运货物1970吨．这一星期平均每天运货物多少吨．
<gadget id="calculator">1_977 * 3</gadget>
<output>5_931</output>

<gadget id="calculator">1_970 * 4</gadget>
<output>7_880</output>

<gadget id="calculator">5_931 + 7_880</gadget>
<output>13_811</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">13_811 / 7</gadget>
<output>1_973</output>

<result>1_973</result>