The students collected tree species, the fourth grade collected 16 kilograms, the third grade collected the weight of the fourth grade (5/6), and the sixth grade (2/3), how many kilograms of tree species were collected by the sixth grade?
同学们采集树种，四年级采集了16千克，三年级采集的重量是四年级的(5/6)，又是六年级的(2/3)，六年级采集树种多少千克？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(5/6) / (2/3)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">16 * (5/4)</gadget>
<output>20</output>

<result>20</result>