There are 45 students in the sixth grade and 60 students in the fifth grade in Changcheng Primary School. The sum of the numbers of the two grades just accounts for (5/12) of the whole school. How many people are there in the school?
长城小学六年级有45人，五年级有60人．两个年级人数的总和正好占全校人数的(5/12)．全校有多少人？
<gadget id="calculator">45 + 60</gadget>
<output>105</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">105 / (5/12)</gadget>
<output>252</output>

<result>252</result>