The number of students in the fourth grade of Xinguang Primary School is 20% less than that of the fifth grade, and the number of students in the third grade is 2/3 of that of the fourth grade. If the number of students in the fifth grade is 120, how many students are in the third grade?
新光小学四年级人数比五年级少20%，三年级人数是四年级的2/3，如果五年级是120人，那么三年级是多少人？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">120 * (4/5) * (2/3)</gadget>
<output>64</output>

<result>64</result>