It was originally planned that one tractor would cultivate 224 mu of land in 7 days, but now it has 152 mu of cultivated land in 4 days. According to this calculation, how many acres of land can be plowed in 7 days more than the original plan? What is the correct column
原计划1台拖拉机7天耕地224亩，现在4天耕地152亩．照这样计算，7天可比原计划多耕多少亩地？正确的列式是多少
<gadget id="calculator">152 / 4</gadget>
<output>38</output>

<gadget id="calculator">224 / 7</gadget>
<output>32</output>

<gadget id="calculator">38 - 32</gadget>
<output>6</output>

<result>6</result>