Two bottles of the same volume, A and B, are filled with salt water respectively. It is known that the ratio of salt to water in bottle A is 2:9, and the ratio of salt to water in bottle B is 3:10. Now mix the two bottles of water in A and B. together, what is the ratio of salt to brine in the mixed brine
甲乙两个容积相同的瓶子分别装满盐水，已知甲瓶中盐、水的比是2：9，乙瓶中盐、水的比是3：10，现在把甲、乙两瓶水混合在一起，则混合盐水中，盐与盐水的比是多少
<gadget id="calculator">59 + 227</gadget>
<output>286</output>

<gadget id="calculator">59 / 286</gadget>
<output>59/286 = around 0.206294</output>

<result>59/286 = around 0.206294</result>