The fifth grade students collected 56 kilograms of tree species, the sixth grade collected more (4/7) than the fifth grade, and how many kilograms more tree species were collected in the sixth grade than in the fifth grade? (Write out the quantitative relation first, and then answer it.)
五年级同学收集树种56千克，六年级收集的比五年级多(4/7)，六年级比五年级多收集树种多少千克？(先写出数量关系式，再解答．)
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">56 * (4/7)</gadget>
<output>32</output>

<result>32</result>