The students went up the mountain to collect tree species. The third grade collected 18.2 kg, 1.9 kg less than the fourth grade, and the fifth grade collected 1.4 times that of the fourth grade. How many kilograms does the fifth grade collect?
同学们上山采集树种．三年级采集18.2千克，比四年级少采集1.9千克，五年级采集的是四年级的1.4倍．五年级采集多少千克？
<gadget id="calculator">18.2 + 1.9</gadget>
<output>20.1</output>

<gadget id="calculator">20.1 * 1.4</gadget>
<output>28.14</output>

<result>28.14</result>