While the terms 'meta-analysis' (a statistical method to combine the results of primary studies), or sometimes 'narrative synthesis', are frequently used to describe how quantitative research is synthesised, far more terms are used to describe the synthesis of qualitative research.
If your question is asking about the equivalent of teaspoons of sugar for the number of grams of sugar a 12 fl oz can of Coca-Cola Classic, then the answer is approximately 10 teaspoons. One can of Coke has 39g of sugar and 1 teaspoon of sugar is the equivalent of 4g of sugar. Answer: approx 10 teaspoons.
To convert grams to teaspoons in this case, you'll need to know that one teaspoon of granulated white sugar is close to four grams. So if you buy a bottle of cola with 44 grams of sugar, you can divide 44 by 4, which is equal to 11 teaspoons of sugar.