There are 240 students in the fifth grade, how many, how many students in the fifth and sixth grades? Fill in the conditions to make this problem a three-step calculation problem.
五年级有学生240人，多少，五六年级共多少人？填上条件，使这个题成为三步计算的应用题．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>