The school clinic wants to prepare a disinfectant solution. The ratio of the solution to water is 3:17. If there are 45 grams of the solution, how many grams of the solution can be prepared.
学校卫生室欲配制一种消毒药水，其药液与水的比是3：17，如果有45克药液，能配制多少克药水．
<gadget id="calculator">45 * 17</gadget>
<output>765</output>

<gadget id="calculator">765 / 3</gadget>
<output>255</output>

<gadget id="calculator">255 + 45</gadget>
<output>300</output>

<result>300</result>