A tractor cultivated 4800 square meters of land yesterday morning, and the area of the cultivated land in the afternoon was (4/5) in the morning. How many square meters did this tractor plow in total yesterday?
一台拖拉机昨天上午耕地4800平方米，下午耕地的面积是上午的(4/5)．这台拖拉机昨天一共耕地多少平方米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">4_800 * (4/5)</gadget>
<output>3_840</output>

<gadget id="calculator">4_800 + 3_840</gadget>
<output>8_640</output>

<result>8_640</result>