There are 45 students in Class 1, Grade 6 in a certain school. Class 62 accounts for 1/4 of the whole grade. Class 62 is exactly 20% more than Class 1. How many students are there in Grade 6 in this school?
某校六年级一班有45人，六二班占全年级的(1/4)，六二班恰好比六一班多20%，这所学校六年级一共有多少人？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(6/5) / (1/4)</gadget>
<output>24/5 = around 4.8</output>

<gadget id="calculator">45 * (24/5)</gadget>
<output>216</output>

<result>216</result>