English ⇄ English Russian +

do the math stresses
gen.	посчитать (самому • It is true that you will save money, but when you do the math the amount is trivial. 4uzhoj)
inf., amer.	подумай сам (To "do the math" means to figure out or put together the information for yourself to come to a logical conclusion. Tumatutuma); сам прикинь (used for telling someone that when they consider all the facts and figures, something cannot succeed or be possible Баян); сам сделай вывод (The idiom "do the math" is widely understood in contemporary English to mean performing a calculation or reasoning logically to arrive at a conclusion, often implying that the solution is obvious. Баян); подсчитывать (You start doing the math, you get to 1% instead of 3%. ART Vancouver); подсчитать (diyaroschuk); поразмыслить (She didn’t need anyone to explain it—she just sat quietly and did the math, concluding that moving abroad would be the best option for her career. Source: theidioms.com 'More)
English thesaurus
do the math
idiom.	used for telling someone that a plan or idea cannot work because it is impossible, too expensive, etc. (Do the math or do the maths? The only difference between math and maths is where they're used. Math is the preferred term in the United States and Canada. Maths is the preferred term in the United Kingdom, Ireland, Australia, and other English-speaking places. • You do the maths: four teams can’t win one trophy. 'More)
do the maths
idiom.	used for telling someone that a plan or idea cannot work because it is impossible, too expensive, etc. (Do the math or do the maths? The only difference between math and maths is where they're used. Math is the preferred term in the United States and Canada. Maths is the preferred term in the United Kingdom, Ireland, Australia, and other English-speaking places. • You do the maths: four teams can’t win one trophy. 'More)

do the math : 6 phrases in 3 subjects

General	1
Idiomatic	4
Rhetoric	1