The fourth and fifth graders collected tree species, the fourth grade collected 14.5 kilograms, and the fifth grade collected 3.8 kilograms less than the fourth grade. How many kilograms of tree species were collected in the fourth and fifth grades?
四五年级同学采集树种，四年级采集了14.5千克，五年级比四年级少采集3.8千克，四五年级一共采集树种多少千克？
<gadget id="calculator">14.5 - 3.8</gadget>
<output>10.7</output>

<gadget id="calculator">10.7 + 14.5</gadget>
<output>25.2</output>

<result>25.2</result>