The fourth and fifth graders of Experimental Primary School dug up 175.6 kilograms of Chinese herbal medicine. There are 45 students in the fourth grade, and each person digs an average of 1.5 kilograms; there are 47 students in the fifth grade, how many kilograms are each person digging on average?
实验小学四、五年级共挖中草药175.6千克．四年级有45人，平均每人挖1.5千克；五年级有47人，平均每人挖多少千克？
<gadget id="calculator">1.5 * 45</gadget>
<output>67.5</output>

<gadget id="calculator">175.6 - 67.5</gadget>
<output>108.1</output>

<gadget id="calculator">108.1 / 47</gadget>
<output>2.3</output>

<result>2.3</result>