900 yuan can buy several A bags or B bags. The number of B bags alone is 1.2 times the number of A bags. The unit price of A bags is 10 yuan more than B bags. How many A bags can be bought with this money? ?
900元钱可买若干个A包或B包，单买B包的个数是单买A包个数的1.2倍，A包单价比B包贵10元，这笔钱可买A包多少个？
<gadget id="calculator">900 * 1.2</gadget>
<output>1_080</output>

<gadget id="calculator">1_080 - 900</gadget>
<output>180</output>

<gadget id="calculator">180 / 12</gadget>
<output>15</output>

<result>15</result>