Zhè dào tí yòngdào le wǒmen shàngzhōu xué guò de gōngshì.
This problem makes use of the formula we learned last week.
Tips
usage
用到 means 'to have occasion to use something' or 'to put something into use'. It often implies that something comes in handy or is called upon. Compare with 用 (to use, simple action) and 用上 (to successfully put to use).
