Xiaoqing prepared 2200 grams of chocolate milk, in which the mass ratio of chocolate to milk was 1:9. After he drank half of it, how much is chocolate in the remaining chocolate milk?
小清调制了2200克巧克力奶，其中巧克力与奶的质量比是1：9．他喝去一半后，剩下的巧克力奶中，巧克力占多少．
<gadget id="calculator">9 + 1</gadget>
<output>10</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(1/10) * 1</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>