Two identical bottles are filled with alcohol solution, the volume ratio of alcohol to water in one bottle is 3:1, and the volume ratio of alcohol to water in the other bottle is 4:1. If two bottles of alcohol solution are mixed, the mass of water in the two bottles is 90 grams, what is the total mass of the original two bottles of alcohol solution in grams?
两个相同的瓶子装满酒精溶液，一个瓶中酒精与水的体积之比是3：1，另一个瓶中酒精与水的体积之比是4：1．若把两瓶酒精溶液混合，则两瓶中水的质量是90克，原来两瓶酒精溶液的质量共多少克？
<gadget id="calculator">90 / 9</gadget>
<output>10</output>

<gadget id="calculator">31 + 9</gadget>
<output>40</output>

<gadget id="calculator">10 * 40</gadget>
<output>400</output>

<result>400</result>