There are 120 students in grade six in our school, which is grade five (2/3), and the number of grade four is grade five (5/6). How many people are there in grade four?
我们学校六年级有120人，是五年级的(2/3)，而四年级的人数是五年级的(5/6)，求四年级有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">120 / (2/3)</gadget>
<output>180</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">180 * (5/6)</gadget>
<output>150</output>

<result>150</result>