A and B have deposits, and A is 100 yuan more than B. If A gives 20% of A's deposit to B, the deposit is 1100 yuan. How much is B's original deposit?
甲、乙两个人存款，甲比乙多100元，如果把甲的20%给乙则存款是1100元，乙原来存款多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">100 * (1/5)</gadget>
<output>20</output>

<gadget id="calculator">1_100 - 20</gadget>
<output>1_080</output>

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

<gadget id="calculator">1_080 / (6/5)</gadget>
<output>900</output>

<result>900</result>