There are 56 students in the sixth grade who participated in the "National Day Celebration" chorus, accounting for 40% of the total number of sixth graders. How many students are there in the sixth grade?
六年级参加"庆国庆"大合唱的学生有56人，占六年级总人数的40%，六年级共有多少人？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">56 / (2/5)</gadget>
<output>140</output>

<result>140</result>