Manager Wang of Red Star Group donates a certain amount of money every year to support poor students to go to school. This money can be used for 900 primary school students, 225 middle school students, or 90 college students. The number of small, middle and college students is the same. How many primary, secondary and college students are available each year?
红星集团王经理每年拿出一定数额的钱义务供养贫困学生上学，这笔钱可供900名小学生，或供225名中学生，或供90名大学生上学，为了使救助活动有连续性，计划每年救助的小、中、大学生人数相同．那每年可供小、中、大学生各多少名？
<gadget id="calculator">1 / 225</gadget>
<output>1/225 = around 0.004444</output>

<gadget id="calculator">1 / 900</gadget>
<output>1/900 = around 0.001111</output>

<gadget id="calculator">1 / 90</gadget>
<output>1/90 = around 0.011111</output>

<gadget id="calculator">(1/225) + (1/900) + (1/90)</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">1 / (1/60)</gadget>
<output>60</output>

<result>60</result>