A certain steelmaking factory smelted a batch of steel in one week. The average daily steel production was 42 tons in the first 2 days, and the average daily steel production was 49 tons in the next 5 days. How many tons of steel was produced on average in this week?
某炼钢厂在一周内炼了一批钢，前2天平均每天炼钢42吨，后5天平均每天炼钢49吨，这一周平均每天炼钢多少吨？
<gadget id="calculator">42 * 2</gadget>
<output>84</output>

<gadget id="calculator">49 * 5</gadget>
<output>245</output>

<gadget id="calculator">84 + 245</gadget>
<output>329</output>

<gadget id="calculator">2 + 5</gadget>
<output>7</output>

<gadget id="calculator">329 / 7</gadget>
<output>47</output>

<result>47</result>