The Young Pioneers collected tree species, the sixth grade collected more (2/3) than the fifth grade, the mass ratio of the fourth grade and fifth grade collected tree species was 6:5, it is known that the fifth grade collected less (3/4) kilograms than the sixth grade , How many kilograms of tree species are collected in the fourth grade?
少先队员采集树种，六年级比五年级多采集(2/3)，四年级和五年级采集树种的质量之比是6：5，已知五年级比六年级少采集了(3/4)千克，四年级采集树种多少千克？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">5 * (2/3)</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">(10/3) - 5</gadget>
<output>-5/3 = around -1.666667</output>

<gadget id="calculator">5 + (-5/3)</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">(3/4) / (10/3)</gadget>
<output>9/40 = around 0.225</output>

<result>9/40 = around 0.225</result>